USGS2; Geologist core description. |
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Top (ft) |
Depth (ft) |
Thick (ft) |
Description |
|
0.00 |
24.00 |
24.00 |
Cased |
|
24.00 |
30.00 |
6.00 |
Claystone, very badly-weathered,
badly iron-stained, red 28.0-28.3'. |
|
30.00 |
30.41 |
0.41 |
Claystone, badly-weathered,
soft, iron-stained, base gradational, slightly silty at base, nonbedded. |
|
30.41 |
31.78 |
1.37 |
Mudstone, silty, clayey, base
arbitrary on increasing silt content, iron-stained, roots??, badly-weathered,
possible blocky peds. |
|
31.78 |
32.35 |
0.57 |
Mudstone, silty, as above,
harder, non-bedded, 'blocky peds', badly-weathered. |
|
32.35 |
36.10 |
3.75 |
Mudstone, silty, weathered at
top, medium green- gray, badly- weathered, possible slickensides on
fractures, base arbitrary. |
|
36.10 |
36.46 |
0.36 |
Mudstone, silty, green-gray,
abundant (up to 50 percent) ankerite, most abundant 36.15 - 36.30', both
contacts arbitrary, toward base ankerite occurs as +/- vertical stingers
(root replacement?), non-bedded to very poorly-bedded, occasional very
poorly-developed slickensides. |
|
36.46 |
38.61 |
2.15 |
Siltstone, green-gray, both
contacts arbitrary, ankerite sporadic throughout in thin vertical stringers
(root filling), ankerite stringers less common toward base, base arbitrary,
locally poorly- preserved bedding at approximately 25 degrees to core edge,
ankerite also in diffuse masses. |
|
38.61 |
40.75 |
2.14 |
Shale, silty, bedded, poorly- to
moderately-developed bedding at approximately 25 degrees to core edge, very
occasional, poorly-developed slickensides, ankerite masses dispersed
throughout, occasional ankerite in 'rootless', occasional small (0.02 - 0.03'),
angular, kaolinite (flint clay) clasts basal 0.3 - 0.4', base arbitrary. |
|
40.75 |
40.90 |
0.15 |
Shale: as above with abundant
ankerite. |
|
40.90 |
42.15 |
1.25 |
Mudstone, slightly silty, green,
non- to poorly-bedded, small green, angular (0.02 - 0.05'), flint clay clasts
(flint clay clasts lighter green than matrix), base arbitrary on occurrence
of ankerite. |
|
42.15 |
44.39 |
2.24 |
Mudstone, slightly silty,
occasional flint clay clasts 43.3 - 43.35', flint clay clasts have
slickensides, occasional slickensides throughout, vertical to sub-vertical,
ankerite-filled fracture (large mud crack?) 0.14' wide at top, thins downward
to nothing near base. |
|
44.39 |
44.63 |
0.24 |
Mudstone, as above with abundant
ankerite throughout, ankerite concentrated on relic bedding at approximately
25 degrees to core edge, green-gray, very hard. |
|
44.63 |
44.80 |
0.17 |
Mudstone, as above without
ankerite, green-gray, gradational to sharp basal contact on sand stringers. |
|
44.80 |
45.15 |
0.35 |
Sandstone, with interbedded
siltstone (50/50), very fine grained sandstone, light to medium green gray. |
|
45.15 |
45.68 |
0.53 |
Sandstone, very fine grained,
light green-gray, occasional small ripples, base sharp on grain size change. |
|
45.68 |
46.46 |
0.78 |
Sandstone, very fine grained,
coarsens to fine grained at base, light green-gray, base arbitrary on grain
size increase and color change, fracture with iron staining, low angle planar
bedding, locally bedding not present. |
|
46.46 |
47.35 |
0.89 |
Sandstone, fine grained, light
gray, ankerite throughout, ankerite in top half concentrated in thin vertical
fractures, ankerite diffuse throughout bottom half, bedding planar to
sub-planar, base sharp on lithology. |
|
47.35 |
47.73 |
0.38 |
Shale, silty, broken in core
barrel, green-gray, greenish locally, both contacts sharp. |
|
47.73 |
48.15 |
0.42 |
Sandstone, fine grained, light
to light-medium gray, 0.15' flint clay layer at 48.08', sub-planar bedding,
base sharp on lithology, ankerite throughout. |
|
|
Note: 48.15 - 54.7' is the
"Mahoning" interval. |
|
48.15 |
51.00 |
2.85 |
Flint clay, brecciated,
cm-scale, light gray, angular clasts exhibit banding (bedding?), clasts at
various angles (slump features), very thin quartz laminations in clasts,
matrix around clasts medium to dark gray, some of darker matrix around flint
clay clasts appear to be secondary, crystalline quartz, clasts decrease
downward, isolated clasts below 49.2', slight increase in 'quartzose' matrix,
base arbitrary. |
|
51.00 |
51.90 |
0.90 |
Flint clay, brecciated, with
quartzose sand matrix, base arbitrary on amount and type of clasts, badly broken in core. |
|
51.90 |
54.70 |
2.80 |
Flint clay, brecciated, clasts
non-banded (bedded?), clasts green-hued and larger, iron-stained fractures,
base arbitrary on lithology, description difficult as core is badly broken. |
|
54.70 |
55.75 |
1.05 |
Mudstone, silty, non-bedded,
occasional small, ankerite mass
dispersed throughout, medium gray, base arbitrary on color change. |
|
55.75 |
56.05 |
0.30 |
Mudstone, silty, occasional
slickensides, dark gray, clayey, mm-scale euhedral pyrite crystals
throughout, base arbitrary on color change. |
|
56.05 |
56.93 |
0.88 |
Mudstone, occasional
slickensides, medium gray with slight green cast, slickensides, non-bedded,
arbitrary basal contact. |
|
56.93 |
58.76 |
1.83 |
Mudstone, slightly silty,
non-bedded, medium gray with siderite top 0.3', very occasional, very small,
euhedral pyrite crystals. |
|
58.76 |
58.94 |
0.18 |
Mudstone, slightly silty,
contains more clay than unit above, bedding perpendicular to edge of core (=
inclined bedding originally), base arbitrary. |
|
58.94 |
60.70 |
1.76 |
Sandstone, rippled, light to
light-medium gray, fine grained, iron stained fractures at 60.3 - 60.5', base
sharp. |
|
60.70 |
60.96 |
0.26 |
Siltstone, bedding perpendicular
to edge of core (= originally inclined), base sharp, common +/- 0.1' clayey
zones, medium gray with slight green cast, slightly sandy toward base, clayey
at base (coarsens downward). |
|
60.96 |
64.55 |
3.59 |
Siltstone, locally clayey,
occasional poorly-developed slickensides on bedding, siderite throughout,
more abundant toward base, base sharp. |
|
|
Note: 64.55 - 65.91' is a
gradational continuum with increasing and decreasing amounts of carbonaceous
material. |
|
64.55 |
65.00 |
0.45 |
Claystone slightly silty, medium
gray, base sharp on color, non-bedded. |
|
65.00 |
65.38 |
0.38 |
Claystone, dark gray, darkening
to black at base, non-bedded, illuviated carbonaceous material. |
|
65.38 |
65.91 |
0.53 |
Claystone, non-bedded,
slickensides, medium to medium-dark gray, as above but lighter in color, base
gradational. |
|
65.91 |
67.55 |
1.64 |
Claystone, dark gray, very badly
broken to crumbly, abundant slickensides on fractures, base arbitrary on
competence of lower unit. |
|
67.55 |
69.16 |
1.61 |
Claystone, dark gray with
occasional medium gray zones with rounded edges, common well developed
slickensides, base sharp on color change, base at 25 degrees to core edge. |
|
69.16 |
69.68 |
0.52 |
Claystone, medium-dark gray
(lighter than above), base sharp on color change and at approximately 25
degrees to core edge, slightly flinty, slickensides. |
|
69.68 |
69.72 |
0.04 |
Claystone, black, both contacts
sharp on color changes. |
|
69.72 |
69.80 |
0.08 |
Claystone, medium to medium-dark
gray, sharp basal contact on color change. |
|
69.80 |
75.40 |
5.60 |
Claystone, hard, medium gray,
darkens slightly to dark gray at base, locally exhibits pedogenic structures
72.39 - 72.5', base arbitrary on siderite content. |
|
75.40 |
76.28 |
0.88 |
Claystone, with massive siderite
(?) masses throughout, lighter claystone stringers to base. |
|
76.28 |
79.15 |
2.87 |
Claystone, light to light-medium
gray, thin (0.01-0.03') dark zones to 77.55 - 77.8', brecciated, increasing
siderite cement to base. |
|
79.15 |
80.00 |
0.85 |
Core Loss. |
|
80.00 |
81.40 |
1.40 |
Siltstone, light gray, with
slight green cast, clayey, top 0.5' broken, occasional small, disseminated
siderite masses, base arbitrary on grain size change. |
|
81.40 |
83.82 |
2.42 |
Siltstone, to silty claystone,
bedded at approximately 25 degrees to core edge, base arbitrary, light-medium
gray with slight greenish cast. |
|
83.82 |
87.00 |
3.18 |
Claystone, light gray with
slight greenish cast, thin (mm-scale) sand stringers below 85.65', base
sharp, 'vugs' on core edge washed out during drilling. |
|
87.00 |
88.80 |
1.80 |
Claystone, slightly silty, very
badly broken, light gray. |
|
88.80 |
90.00 |
1.20 |
Claystone, silty, gray, locally
broken in core barrel, light gray, locally approaches siltstone, bedded, base
gradational and arbitrary on grain size. |
|
90.00 |
94.41 |
4.41 |
Siltstone, medium gray, bedding
at 20- 40 degrees to core edge, very rare mica flakes, small, brown, iron
oxide-cemented, ellipsoidal (0.1 - 0.15') zones, locally clayey, rounded
claystone clasts +/- 90.7', vertical (thin) ironstone-filled stringers (roots),
base arbitrary on color change. |
|
94.41 |
95.40 |
0.99 |
Claystone, silty, medium gray
(darker than unit above), non-bedded, occasional small siderite nodule, basal
contact arbitrary. |
|
95.40 |
97.45 |
2.05 |
Siltstone, medium gray, vertical
fracture filled with siderite, fracture thins downward, diffuse siderite
throughout, slickensides, base sharp. |
|
97.45 |
97.75 |
0.30 |
Siltstone, with thin sandstone
stringers, medium gray, top and bottom contacts arbitrary on loss of
sandstone stringers, pyrite blebs, siderite nodules. |
|
97.75 |
99.82 |
2.07 |
Siltstone, clayey, micaceous,
medium gray, occasional thin sand stringers, occasional ironstone blebs, base
sharp on color change, bedded. |
|
99.82 |
104.30 |
4.48 |
Siltstone, sandy, abundant mica
flakes, ironstone blebs, sandstone stringers, medium gray to medium-dark
gray, base sharp on increase in sand content, bedding at approximately 25
degrees to edge of core, pyrite filling on many bedding planes, clayey around
102.0. |
|
104.30 |
106.82 |
2.52 |
Siltstone, common to occasional
sandy streaks, medium gray, bedded at +/- 25 degrees, common Fe stone bands
in sandy zones, possible ripples, lose sand
base, base arbitrary on loss of sand. |
|
106.82 |
108.60 |
1.78 |
Siltstone, clayey, thin sand
streaks top 0.5, abundant, badly macerated plant fragments throughout with
pyrite locally replacing plant fragments, bedded at approximately 25 degrees
to edge of core, occasional small ripples, one green (epidote-colored) bleb,
basal 0.1 sandy, dark gray with brown tint. |
|
|
Upper Freeport Rider coal bed,
108.60 - 109.20' (0.60'), Elv.= 2932.33', not sampled. |
|
108.60 |
108.69 |
0.09 |
Parting, interbedded sandstone,
coal layers and bone layers, bedding contorted. |
|
108.69 |
108.80 |
0.11 |
Bone, no bedding evident, no
vitrains, medium density, minor pyrite lens. |
|
108.80 |
109.20 |
0.40 |
Bone, shaley, medium density,
contains numerous thin lenses and layers of pyrite. Basal 0.02' contains
large pyritized sandstone lenses and layers. |
|
109.20 |
109.67 |
0.47 |
Siltstone, dark gray, sand
streaks, bedding at approximately 25 degrees to edge of core, plant
fragments, base sharp, dark gray. |
|
109.67 |
110.25 |
0.58 |
Shale, thin pyrite films on
bedding, medium gray, weathers with slight brown tint. |
|
110.25 |
110.43 |
0.18 |
Claystone, black, non-bedded,
base sharp on color. |
|
110.43 |
110.86 |
0.43 |
Claystone, silty, slickensides,
dark gray. |
|
110.86 |
111.08 |
0.22 |
Claystone, black, slickensides,
base sharp on color. |
|
111.08 |
114.28 |
3.20 |
Shale, pyrite, medium to dark
gray, poorly-preserved plant fragments, 113.5-114.0, poorly bedded, locally
silty, root traces. |
|
114.28 |
114.86 |
0.58 |
Claystone, non-bedded,
medium-dark gray, base sharp on color. |
|
114.86 |
114.90 |
0.04 |
Claystone, black, both contacts
sharp. |
|
114.90 |
115.30 |
0.40 |
Claystone, dark gray,
slickensides, non-bedded, common to abundant slickensides, base sharp on
color. |
|
115.30 |
115.40 |
0.10 |
Claystone, black, contact on
base of coal. |
|
|
Contact: Conemaugh Group. And
Allegheny Formation. |
|
|
Upper Freeport coal bed, 115.40
- 119.89 (4.49'), Elv.= 2925.53', sampled 115.40 - 120.90' (5.50'). |
|
115.40 |
115.72 |
0.32 |
Bone, canneloid, high density,
abundant thick (2mm) pyrite layers across the 3 inch core, few 1-2mm
vitrains. |
|
115.72 |
115.97 |
0.25 |
Coal, clarain, bright, soft,
occasional partially pyritized fusain bands. |
|
115.97 |
116.11 |
0.14 |
Shale, silty, dark gray,
contains thin vitrain stringers. |
|
116.11 |
116.15 |
0.04 |
Coal, clarain, bright, 116.15 -
116.21', parting, interbedded bone and carbonaceous shale in distinct 0.02 -
0.03' layers, few slickensides, minor thin vitrains. |
|
116.15 |
116.21 |
0.06 |
Parting, interbedded bone and
carbonaceous shale in distinct 0.02 - 0.03' layers, few slickensides, minor
thin vitrains. |
|
116.21 |
116.42 |
0.21 |
Coal, clarain, dull, occasional
fusains and pyrite lenses. |
|
116.42 |
116.75 |
0.33 |
Shale, dark gray, very hard and
dense, no bedding evident, barren, not rooted, thin dull coal layer at 116.68
- 116.70'. |
|
116.75 |
116.95 |
0.20 |
Coal, clarain, dull, soft,
fractured. |
|
116.95 |
117.35 |
0.40 |
Coal, clarain, bright, soft,
very fractured but intact in core, occasional small pyrite lens. |
|
117.35 |
117.75 |
0.40 |
Mudstone, dark gray, dense,
bedding was poor and irregular with irregular lenses and layers of mixed
mudstone and millimeter size vitrain particles in sharp contact with lighter
and darker mudstone layers. The parting was barren except for a single very large
(>3 inch) flattened Stigmaria near the base of the parting. |
|
117.75 |
119.60 |
1.85 |
Coal, for the most part the coal
was bright clarain with occasional 0.01 - 0.02‘ thick fusains mineralized
with clays. The lower 1.0' of the bench was dull clarain, somewhat intact in
the core. Core was very fractured and wet and shortened somewhat, therefore
the description is poor. |
|
119.60 |
119.81 |
0.21 |
Shale, silty, black, highly
carbonaceous, mottled black and dark gray silty shale with very disrupted and
contorted bedding and occasional inter-fingering 1-10 mm layers of gray
siltstone. Shales and siltstones contain abundant fine coaly materials and common
small and large pyrite lenses and pyrite on fracture surfaces. Probable roots
and 1-2mm vitrains were common. |
|
119.81 |
119.89 |
0.08 |
Bone, black, silty, contains
interbedded bone, vitrain, clarain and carbonaceous shale lenses with minor
small lenses of pyrite. |
|
119.89 |
120.90 |
1.01 |
Coal, clarain, bright with
common 1-2mm vitrain bands and common 1-3mm fusain lenses mineralized with
clays. The coal was extremely fractured (½ inch size consist) in the lower
0.50'. |
|
120.90 |
125.20 |
4.30 |
Claystone, broken and partially
lost core (4 feet of core in 2 feet of box), remainder is moderate hard. |
|
125.20 |
128.30 |
3.10 |
Fireclay, plastic, like
"toothpaste" in core box, medium dark brown to gray, slickensided
fractures. |
|
|
NOTE: 128.3 - 139.0 represents a
stacked paleosol sequence. |
|
128.30 |
131.75 |
3.45 |
Claystone, weathers yellowish,
medium to light-medium gray, ironstone concretions, nonbedded, (paleosol). |
|
131.75 |
132.05 |
0.30 |
Ironstone, concretions with
claystone stringers. |
|
132.05 |
132.55 |
0.50 |
Claystone, dark gray, top and
bottom contacts arbitrary on color change. |
|
132.55 |
135.60 |
3.05 |
Claystone, medium gray, possible
slickensided fractures, ironstone approximately 133.0', top and bottom
contacts arbitrary on color change, weathers yellow. |
|
135.60 |
138.60 |
3.00 |
Claystone, medium gray, locally
crumbly, weathers yellowish, possible root traces, abundant slickensides,
root traces(?) brown, iron-stained, basal +/- foot, dark gray. |
|
138.60 |
139.00 |
0.40 |
Claystone, silty, nonbedded,
diffuse siderite throughout, slickensides, light-medium gray with faint
yellow stains, base sharp. |
|
139.00 |
139.77 |
0.77 |
Siltstone, poorly-bedded,
occasional poorly developed slickensides, occasional plant fragments,
diffuse, red-weathering siderite throughout base arbitrary on increase in
iron stone at base. |
|
139.77 |
140.60 |
0.83 |
Siltstone, extremely abundant
ironstone nodules, no bedding, broken, dark clasts near base, basal contact
arbitrary. |
|
140.60 |
141.13 |
0.53 |
Siltstone, pyrite film on
bedding, medium gray, bedded with thin, very fine grained sandstone
stringers, inclined bedded toward base, wavy, thin, vertical, irregular,
ironstone-filled fractures (roots?), base arbitrary on loss of bedding. |
|
141.13 |
141.75 |
0.62 |
Siltstone, medium olive gray,
clayey, poorly-bedded, base arbitrary on increase in ironstone content. |
|
141.75 |
143.25 |
1.50 |
Siltstone, non-bedded, root
traces, slickensides, occasional clasts of flint clay, olive green-gray, fine
silt, thin, irregular, vertical, ironstone stringers (roots?), base arbitrary
on loss of ironstone and increase in number of sandstone streaks. |
|
143.25 |
144.10 |
0.85 |
Claystone, sandstone streaks,
medium gray with slight green tint, occasional thin, vertical, ironstone
stringers, occasional small, angular, 'flint clay' clasts, base gradational
over 0.2', poorly-bedded, occasional slickensides. |
|
144.10 |
144.80 |
0.70 |
Claystone, slickensides, dark
gray to black, non-bedded, base sharp. |
|
144.80 |
146.50 |
1.70 |
Claystone, slickensided
fractures, medium gray with slight green tint, thin, irregular, vertical,
ironstone-filled fractures (roots?), ironstone becomes massive basal 0.1 -
0.15', non- bedded. |
|
146.50 |
148.20 |
1.70 |
Claystone, poorly-bedded, medium
gray-green, occasional rounded ironstone nodules up to 0.1' in diameter,
occasional poorly-developed slickensides, bedding improves toward base,
ironstone nodule at 147.2' and 147.8 - 148.0'. |
|
148.20 |
148.84 |
0.64 |
Claystone, bedded, medium
green-gray, occasional very poorly-developed slickensides, base arbitrary on
color change. |
|
148.84 |
149.18 |
0.34 |
Claystone, as above with
approximately 50 percent diffuse ironstone throughout, top and bottom
contacts gradational. |
|
149.18 |
149.65 |
0.47 |
Claystone, as above with
sandstone stringers and large ironstone nodules (not diffuse), unit comprised
of 50 percent ironstone nodules. |
|
149.65 |
152.68 |
3.03 |
Siltstone, with thin sandstone
streaks, bedding 6 - 8 degrees to core edge, medium green- gray (not
Conemaugh green), mica flakes on bedding, base arbitrary on increase in sand
content. |
|
152.68 |
157.50 |
4.82 |
Sandstone and siltstone,
interbedded, sandstone (>50 percent), very fine- to fine grained, light
gray, planar bedded to occasional rippled, siltstone, light-medium
green-gray, mica flakes on bedding, base arbitrary on loss of sand, 0.02 -
0.03' ironstone band at 153.97', 154.38', and 154.85'. |
|
157.50 |
157.90 |
0.40 |
Siltstone, medium to medium-dark
gray, sandstone streaks, bedding at approximately 12 degrees to core edge,
very small ripples, mica on bedding, base arbitrary on increase in sand
content. |
|
157.90 |
158.31 |
0.41 |
Siltstone, sandstone streaks
(sandstone approximately 40 percent), dark gray, base arbitrary on loss of
sand, small scale ripples. |
|
158.31 |
158.93 |
0.62 |
Siltstone, sandstone stringers,
sand content increases toward base, rippled, dark gray with slight green
tint, occasional poorly-preserved wood fragments. |
|
158.93 |
159.70 |
0.77 |
Shale, well-bedded, dark gray,
occasional sandstone stringers near top, base arbitrary on color change. |
|
159.70 |
160.42 |
0.72 |
Shale, black, carbonaceous,
badly-preserved plants at 160.2 - 160.3' (sampled), plant stem hash below
160.3' to base, poorly-bedded. |
|
160.42 |
162.71 |
2.29 |
Siltstone, black, carbonaceous,
thin sandstone stringers, occasional to locally-common plant trash
throughout, Macroneuropteris scheuchzerii: stem frays, cf. Linopteris sp. at 161.35', M scheuchzerii at 162.3' (plants sampled), occasional pyrite bleb, vitrain
chips locally on bedding, base arbitrary on decrease in sand content. |
|
162.71 |
163.89 |
1.18 |
Siltstone, black, sandstone
streaks, base arbitrary on lighter color, shale carbonaceous, small vitrain
chips, coalified (vitrain) plant fragments throughout, though more common
toward top. |
|
163.89 |
167.68 |
3.79 |
Shale, dark gray to black, very
occasional slickensides, very rare small, plant stems, base sharp. |
|
|
Lower Freeport coal bed, 167.68
- 171.15 (3.47'), Elv.= 2873.25' |
|
167.68 |
168.20 |
0.52 |
Coal, clarain, dull, extremely
fractured (1/8 to 1/4 inch size consist), wet with no apparent partings. |
|
168.20 |
168.32 |
0.12 |
Shale, intact in core,
carbonaceous, bony, extremely hard, slickensided, no bedding, conchoidal
fracture, rare carbonaceous streaks, no plant trash or fossils evident,
numerous small approximately 0.5mm pyrite spheres. |
|
168.32 |
168.40 |
0.08 |
Bone, medium density with
numerous thin vitrain stringers. |
|
168.40 |
169.30 |
0.90 |
Coal, clarain, dull, common
fusains, extremely fractured (1/4 inch size consist). |
|
169.30 |
169.33 |
0.03 |
Shale, carbonaceous |
|
169.33 |
169.36 |
0.03 |
Coal, clarain, dull with
abundant fusains. |
|
169.36 |
169.37 |
0.01 |
Shale, carbonaceous. |
|
169.37 |
169.48 |
0.11 |
Coal, clarain, dull, common
pyritized fusains. |
|
169.48 |
171.15 |
1.67 |
Core Loss, probably coal with
partings. |
|
171.15 |
172.30 |
1.15 |
Claystone, very soft,
unconsolidated in core box, harder clasts throughout, medium gray, weathered
from drilling fluid, basal contact on mud. |
|
172.30 |
177.20 |
4.90 |
Claystone, non-bedded, slightly
silty, common slickensides, yellow ironstain on surface of core, occasional
ironstone concretions, light-medium gray, basal contact sharp. |
|
177.20 |
178.00 |
0.80 |
Siltstone, medium gray, weathers
light yellow, iron stain on core surface, base sharp on change in grain size,
very rare sand streak, diffuse ironstone cement. |
|
178.00 |
179.45 |
1.45 |
Claystone, medium gray to dark
gray, light yellow iron stain on surface, slickensides. |
|
179.45 |
183.67 |
4.22 |
Siltstone, sandstone stringers,
coarsens slightly toward base, medium gray, yellow iron stain on core
surface, occasional lycopod rootlet, poorly-bedded, basal contact sharp. |
|
183.67 |
183.87 |
0.20 |
Siltstone, as above with >50
percent ironstone, basal contact sharp. |
|
183.87 |
185.18 |
1.31 |
Sandstone, very fine- to fine
grained, slightly rippled, silty 184.2 - 184.35', base arbitrary on grain
size, bedded, siltstone drapes ripples. |
|
185.18 |
188.39 |
3.21 |
Siltstone, sandstone
interbedded, sandstone, very fine grained, occasional ironstone concretions
throughout, larger septarian nodules basal 0.5 feet, bedded at approximately
25 degrees to edge of core, base sharp, light to medium gray with green tint. |
|
188.39 |
191.58 |
3.19 |
Siltstone, medium green-gray,
occasional small ironstone concretion, iron-staining throughout, silty at
189.25', well-bedded, common to abundant iron cement (diffuse) 191.0' to
base, basal contact arbitrary on grain size. |
|
191.58 |
192.18 |
0.60 |
Mudstone, silty, medium green
gray, very occasional plant fragments (nothing identifiable), base sharp on
Lithology, poorly-bedded. |
|
192.18 |
193.75 |
1.57 |
Sandstone, very fine grained,
light gray, darkens toward base, soft sediment deformation 193.4' to base. |
|
193.75 |
193.95 |
0.20 |
Claystone, medium gray with
slight greenish tint. |
|
193.95 |
202.30 |
8.35 |
Sandstone, lithic, very fine
grained at top, coarsens to fine- to medium-grained at base, micaceous,
iron-stained fractures, small vugs, massive, base sharp, stem fragments
locally on bedding. |
|
202.30 |
202.60 |
0.30 |
Shale, broken in core barrel. |
|
202.60 |
203.40 |
0.80 |
Shale, black, canneloid,
occasional small stem fragment, broken in core barrel, pyrite. |
|
|
Upper Kittanning coal bed,
203.40-204.70 (1.3'), Elv.= 2837.53' |
|
203.40 |
204.70 |
1.30 |
Coal, severely fractured at inch
size consist, wet, few intact core segments show bright clarain and a 0.08'
carbonaceous shale parting somewhere within the coal bed. |
|
204.70 |
205.42 |
0.72 |
Claystone, pyrite, very dark
gray, slickensides, crumbly, very occasionally silty, base arbitrary on core
loss below. |
|
205.42 |
210.85 |
5.43 |
Core Loss |
|
210.85 |
212.66 |
1.81 |
Mudstone, non-bedded, light
yellow gray, hard, occasional small flint clay clasts, base arbitrary on
color change. |
|
212.66 |
212.82 |
0.16 |
Mudstone, coal clasts, medium to
dark gray, very poorly-bedded, base arbitrary on color change. |
|
212.82 |
217.00 |
4.18 |
Mudstone, dark gray 213.1 -
213.6', otherwise light to medium gray, root traces, slickensides, base sharp
on lithology, clayey, locally contains small, angular, flint clay clasts. |
|
217.00 |
219.22 |
2.22 |
Sandstone, very fine grained,
silty matrix, soft sediment deformation at top, poorly-bedded, plant
fragments and fossils, lycopod root traces, bedding becomes well-developed
and rippled below 218.4', iron stained, sharp, angular basal contact. |
|
219.22 |
219.53 |
0.31 |
Sandstone, fine- to
medium-grained, obscure bedding, light gray, quartzose, ironstone cement,
base sharp. |
|
219.53 |
219.80 |
0.27 |
Siltstone, medium gray, bedded,
occasional small plant fragment, basal contact sharp and angular. |
|
219.80 |
220.25 |
0.45 |
Siltstone, as above, sharp basal
contact. |
|
220.25 |
221.00 |
0.75 |
Claystone, silty, occasional
thin (0.02 - 0.03') ironstone band, medium green-gray, bedded, top half badly
broken in core barrel, base arbitrary on broken rock. |
|
221.00 |
221.50 |
0.50 |
Core Loss, exact interval
questionable |
|
221.50 |
222.80 |
1.30 |
Shale, dark gray, broken in core
barrel, slickensided fractures, silty, very fine mica flakes locally, sharp
basal contact. |
|
222.80 |
223.04 |
0.24 |
Sandstone, fine grained, white,
broken in core barrel, lithic, base questionable due to core broken on core
barrel. |
|
223.04 |
227.00 |
3.96 |
Claystone, very slightly silty,
medium to medium-dark gray, bedded, occasional poorly- developed
slickensides, stem fragments, becomes clayey siltstone locally, occasional
thin sand stringer basal 0.5'. |
|
|
Middle Kittanning coal bed,
227.00-227.80 (0.80'), Elv.= 2813.93' |
|
227.00 |
227.10 |
0.10 |
Bone, shaley, with minor
vitrains, abundant large pyrite lenses, some pyrites were in fusains,
slickensides. |
|
227.10 |
227.23 |
0.13 |
Bone, shaley, with abundant
cm-size, 1 mm thick vitrain fragments, most angular and many contorted and at
angles to very poor bedding, common pyrite lenses. This layer appears to
represent a reworked sediment with plant fragments acting as interclasts. Pyrite
was abundant. |
|
227.23 |
227.32 |
0.09 |
Shale, dark brown, bony, thin
vitrains interbedded with shale layers, occasional fusains and common pyrite
layers and lenses. The vitrain fragments were small, angular, contorted and
fragmental, much smaller than in the bands a |
|
227.32 |
227.40 |
0.08 |
Coal, clarain, dull with thick
vitrains (one 6mm thick). Banding was contorted and draped over the sulfur
ball below. |
|
227.40 |
227.50 |
0.10 |
Pyrite, sulfur ball, very likely
a large pyritized fusain, thins to 0.05' within the core. |
|
227.50 |
227.68 |
0.18 |
Coal, clarain, dull, with common
1-2mm vitrain bands. |
|
227.68 |
227.80 |
0.12 |
Coal, clarain, dull, with common
uncompressed, 3mm by 6mm pyritized fusains. Lower 0.07' nearly canneloid in
appearance. |
|
227.80 |
228.20 |
0.40 |
Claystone, black, carbonaceous,
grades lighter near base, base arbitrary on color change, preserved
carbonized plant stem fragments, non-bedded. |
|
228.20 |
231.37 |
3.17 |
Claystone, dark gray,
carbonaceous, root traces, common slickensided fractures, common carbonized
plant fragments, lighter slightly toward base, base arbitrary on color
change. |
|
231.37 |
240.50 |
9.13 |
Siltstone, becomes slightly
sandy from middle downward, medium gray with slight green gray tint, very
poorly-bedded, root traces near top, bedding improves below 233.0', very fine
grained sandstone 235.5 - 236.0', bedding at approximately 25 degrees to core
edge, large, rounded ironstone masses 238.35 - 239.05', grades to very fine
grained sandstone with silty matrix 239.3' to base, generally planar bedded,
occasional small ironstone nodules basal foot, base arbitrary on grain size
increase. |
|
240.50 |
241.05 |
0.55 |
Sandstone, very fine grained,
light gray, bedding at 25 degrees to edge of core, sharp basal contact. |
|
241.05 |
245.17 |
4.12 |
Siltstone, medium gray, bedded,
occasional (0.01 to 0.1') sand stringers throughout, occasional ironstone
concretions throughout, abundant ironstone 244.5' to base, base sharp. |
|
245.17 |
248.00 |
2.83 |
Sandstone, light gray, laminated
locally with carbonaceous material draping bedding, rippled, basal contact
sharp, very fine- to fine grained, pyrite present, Grady intervals 245.25 -
247.62' (2.36'), 247.80 - 249.90' (2.10') sampled. |
|
247.80 |
249.90 |
|
Lower Kittanning coal bed,
248.00 - 260.00' (12.00'), Elv.= 2792.93' |
|
248.00 |
248.05 |
0.05 |
Coal, clarain, dull, impure. |
|
248.05 |
248.09 |
0.04 |
Bone, interbedded with impure
clarain. |
|
248.09 |
248.20 |
0.11 |
Shale, gray, silty, slickensided
with contorted bedding. Contains large (>1 cm) well preserved leaf
imprints that are unidentifiable due to contortions in bedding. |
|
248.20 |
248.42 |
0.22 |
Coal, durain with common 1-2mm
vitrain bands and contorted bedding. |
|
248.42 |
248.74 |
0.32 |
Coal, clarain, bright, soft,
very fractured. |
|
248.74 |
249.19 |
0.45 |
Coal, clarain, dull, fractured. |
|
249.19 |
250.30 |
1.11 |
Coal, clarain, bright, soft,
very fractured. |
|
250.30 |
250.64 |
0.34 |
Mudstone, dark gray,
poorly-bedded, barren. |
|
250.64 |
250.74 |
0.10 |
Bone, silty, interbedded with
brown silty shale bands and vitrains up to 3cm thick. |
|
250.74 |
250.82 |
0.08 |
Coal, clarain, dull. |
|
250.82 |
250.83 |
0.01 |
Pyrite, contorted but continuous
in 3 inch core. |
|
250.83 |
251.89 |
1.06 |
Coal, semi-splint, dull, the
upper 0.30' is 50 percent interbedded 0.05' dull clarains becoming thinner
downward and grading into pure semisplint with minor thin vitrains. |
|
251.89 |
253.10 |
1.21 |
Coal, clarain, bright, extremely
fractured in core with a size consist of <1/4 inch. |
|
253.10 |
253.24 |
0.14 |
Shale, carbonaceous, grades down
to bone at base, upper contact with coal is very sharp. |
|
253.24 |
253.60 |
0.36 |
Bone, medium density with minor,
very thin, isolated vitrains. |
|
253.60 |
260.00 |
6.40 |
Core Loss, coal and parting. |
|
|
NOTE: 266.00 - 275.61' is a
single genetic package. |
|
260.00 |
260.91 |
0.91 |
Mudstone, poorly-bedded,
slightly silty, occasional plant fragments, dark to very dark gray, pyrite,
basal contact arbitrary on color change. |
|
260.91 |
261.21 |
0.30 |
Claystone, black, carbonaceous,
abundant pyrite replacing plant debris, slickensides, base arbitrary on color
change, slightly silty. |
|
261.21 |
261.79 |
0.58 |
Shale, dark to medium-dark gray,
poorly developed slickensides, common medium to coarse sand grains floating
in mud matrix, base sharp on lithology. |
|
261.79 |
262.20 |
0.41 |
Sandstone, medium-grained,
locally coarse grained, non-bedded, locally exhibits relic bedding, light
gray, base gradational. |
|
262.20 |
263.57 |
1.37 |
Mudstone, top 0.15' sandy,
light-medium gray, poorly-bedded, occasional root trace, occasional coalified
stem fragment, medium-grained sandstone 263.55' - base. |
|
263.57 |
264.20 |
0.63 |
Sandstone, with siltstone
interbeds, very fine grained, light to medium gray, base sharp, beds +/- 0.1'
thick. |
|
264.20 |
264.77 |
0.57 |
Sandstone, fine grained, soft
sediment deformation, medium-gray, base arbitrary on change in bedding. |
|
264.77 |
265.70 |
0.93 |
Sandstone, fine- to
medium-grained, lithic, mica flakes, coalified plant fragments, bedding at
approximately 25 degrees to edge of core, base sharp. |
|
265.70 |
266.28 |
0.58 |
Sandstone, very fine grained,
medium gray, base sharp. |
|
266.28 |
270.53 |
4.25 |
Siltstone, with common
interlaminated sandstone, sandstone, light gray, very fine grained,
siltstone, medium gray, common small ironstone bands, vertical irregular
ironstone mass (fracture filling) 268.2 - 269.0', mica flakes on bedding. |
|
270.53 |
271.05 |
0.52 |
Sandstone, very fine- to fine
grained, occasional small rips, thin (+/- 0.03') ironstone bands near top,
mica flakes and plant fragments draping bedding, base arbitrary on grain
size. |
|
271.05 |
272.56 |
1.51 |
Siltstone, sandstone stringers,
same as unit at 266.28 - 270.53', base sharp on increase in grain size. |
|
272.56 |
272.67 |
0.11 |
Sandstone, very fine- to fine
grained, light gray, bedding approximately 10 degrees to core edge (planar
bedded), base sharp. |
|
272.67 |
273.18 |
0.51 |
Siltstone to mudstone. |
|
273.18 |
273.40 |
0.22 |
Sandstone and siltstone
interlaminated, rippled. |
|
273.40 |
275.40 |
2.00 |
Siltstone, sandstone stringers,
long ironstone nodules 274.4 - 275.0', base sharp. |
|
275.40 |
275.61 |
0.21 |
Sandstone, very fine- to fine
grained, angular, erose, sharp basal contact. |
|
275.61 |
277.45 |
1.84 |
Shale, slightly silty,
well-bedded, medium gray with slight green tint, base sharp on ironstone
zone. |
|
277.45 |
277.82 |
0.37 |
Shale, as above, mostly replaced
by nodular ironstone. |
|
277.82 |
279.37 |
1.55 |
Shale, medium to medium-dark
gray, sharp basal contact. |
|
279.37 |
280.00 |
0.63 |
Mudstone, medium to light-medium
gray, common slickensides, root traces, poorly- to non-bedded, base sharp on
color. |
|
280.00 |
280.90 |
0.90 |
Shale, black, poorly-bedded,
occasional slickensides, occasional carbonized and pyritized plant trash. |
|
|
Clarion coal bed, 280.90 -
283.10' (2.20'), Elv.= 2760.03', sampled 280.90 - 283.10' (2.20'). |
|
280.90 |
281.25 |
0.35 |
Coal, clarain, bright, soft, a
very large 1 inch by >2 inch lens of mineralized fusain near the top of
the coal. The fusain was mineralized with clays, probably kaolinite and not
pyrite. Sample badly crushed and description is limited. |
|
281.25 |
281.57 |
0.32 |
Coal, clarain, dull, fractured,
minor 1mm x 2cm pyrite lenses. |
|
281.57 |
281.75 |
0.18 |
Coal, clarain, dull, impure,
mineral impurities appear granular as below. |
|
281.75 |
282.00 |
0.25 |
Coal, bone, very impure and
dense. Matrix appears granular on a sub-millimeter scale, imparting an grainy
canneloid appearance to the matrix. Vitrain bands <0.5mm thick were common
and extended unbroken over 1 to 5 cm in the core. Pyrite lenses were minor, 1
mm thick and probably pyritized fusains. Unmineralized fusains were minor and
the same size as the vitrains. Minor cleat? calcite <1mm in size was rare. |
|
282.00 |
283.10 |
1.10 |
Coal, bone, occasional thin
vitrain band, fusain locally, carbonized stem fragments on bedding, abundant
pyrite replacing plant stems, base gradational. |
|
283.10 |
284.30 |
1.20 |
Shale, black, very coaly, common
pyrite and carbonized stem fragments, becomes clayey basal 0.15', base sharp,
common thin pyrite streaks. |
|
284.30 |
287.30 |
3.00 |
Claystone, white, noncalcareous
stringers, medium to light-medium gray, flinty below 286.0', base arbitrary
on color change, very occasional small slickensides, medium sand grains
floating in clay matrix approximately 286.8'. |
|
287.30 |
287.35 |
0.05 |
Claystone: as above but very
dark gray, carbonaceous ((OA horizon). |
|
287.35 |
288.42 |
1.07 |
Mudstone, dark gray, becomes
poorly-bedded toward base, base arbitrary on bedding change, (paleosol). |
|
288.42 |
290.60 |
2.18 |
Siltstone, poorly-bedded at top,
root traces, occasional small plant fragments, medium- dark gray, base sharp. |
|
|
Contact: Allegheny Formation.
and Pottsville Group. |
|
290.60 |
291.75 |
1.15 |
Sandstone, very fine grained,
quartzose, root traces, disrupted bedding
(from rooting), basal contact on loss of roots, occasional mica flakes
on bedding, very light gray to white. |
|
291.75 |
303.40 |
11.65 |
Sandstone, very fine grained,
stylolites, very hard, quartzose (looks like sugar). |
|
303.40 |
315.00 |
11.60 |
Sandstone, very hard, little
recovery, air hammered to TD. |
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