CT
Grenville Belt
Metamorphic Rocks, other
Cc
Cheshire Quartzite
Cd
Dalton Formation
Grenville Shelf Sequence
Eugeosyncline Sequence
Pelitic Rocks
Ce
Everett Schist
Ch
Hoosac Schist
Cm
Manhattan Schist
Mafic Rocks
Cma
Sulfidic Schists
Cmcl
Manhattan Schist, Canaan Mtn. Schist
Cmcu
Cmcub
Carbonate Rocks
Csb
Stockbridge Marble; unit b
Csc
Stockbridge Marble; unit c
Granite, other
Cwb
Waterbury Gneiss
NH-ME Sequence
D?d
quartz diorite
Bronson Hill Sequence
Dbl
Littleton Formation
Dblm
Littleton Formation, Mount Pisgah Mbr.
Dc
Canterbury Gneiss
Avalon Belt
Dce
Canterbury Gneiss, "Eastford gneiss phase"
De
Erving Formation
Dgg
granite gneiss
Dl
Lebanon Gabbro (Lebanon Granite)
Dm
Maromas Granite Gniess
Dn
hornblende norite
Dng
Nonewaug Granite
DSs
Scotland Schist
Oakdale Formation, Scotland Schist Mbr.
DSsq
Dst
Hartland Belt; The Straits Schist
DSw
Wepawaug Schist
Basalt
Jb
Buttress Dolerite
Mesozoic Basin
Jb?
Mesozoic Basin Sed.
Jeb
East Berlin Formation
Jha
Hampden Basalt
Jho
Holyoke Basalt
Jp
Portland Arkose
Jp?
Jp+Trnh
(See Jp and Trnh descriptions)
Jsm
Shuttle Meadow Formation
Jta
Talcott Basalt
Jwr
West Rock Dolerite
Jwr?
Oa+Oma
Allingtown metavolcanics and Maltby Lakes metavolcanics
Ob
Brookfield Gneiss
Obr
Brimfield Schist
Obr?
Obrg
Obs
Bristol Gneiss
Oc
Collinsville Formation
Oc+Ot
(See Oc and Ot descriptions)
OC-r
Rowe Schist
OC-ra
Rowe Schist; amphibolite mbr.
OC-r+OC-ra
(See OC-r and OC-ra descriptions)
OC-s
Stockbridge Marble
Ocg
Och
Collins Hill Formation
Och+Om
(See Och and Om descriptions)
Ochv
Ocm
Cobble Mtn. Formation
Ocs
Collinsville Fm., Sweetheart Mt. Mbr.
Og
granitic gneiss
Og?
Grenville Granites
Og+Yg
(See Og and Yg descriptions)
Ogh
Golden Hill Schist
Ogh?
Ogl
Glastonbury Gneiss
Oh
Harrison Gneiss
Oh?
Ohb
Harrison Gneiss, Beardsley Mbr.
Calcgranofels
Ohc
Hawley Formation
Ohp
Harrison Gneiss, Pumpkin Ground Mbr.
Ohp+Ob
(See Ohp and Ob descriptions)
Ohp+Oh
(See Ohp and Oh descriptions)
Ol
Litchfield Norite
Om
Middletown Formation
Omal
Maltby Lakes Metavolcanics
Omau
Omm
Omo
Monson Gneiss
Omo+Oml+Och
(See Omo, Oml, and Och descriptions)
Omu
Oo
Oronoque Schist
Op
Preston Gabbro
Op+Oq
(See Op and Oq)
Opd
Oq
Quinebaug Formation
Oqf
Or
Ratlum Mtn. Schist
Or+OC-r+Ora
(See Or, OC-r, and Ora)
Ora
Ratlum Mtc. Schist
Ose
Ot
Taine Mtn. Formation
Ot+Otb+Oc+DSts
(See Ot, Otb, Oc, and DSts)
Ota
Tatnic Hill Formation
Ota+SOh
(See Ota and SOh)
Otf+Og
(See Otf and Og)
Otfc
Trap Falls Formation, Carringtons Pond Mbr.
Otfg
Trap Falls Formation
Otfg+Otfs+Otf
(See Otfg, Otfs, and Otf)
Otfs
Trap Falls Formation, Shelton Mbr.
Ots
Taine Mtn. Formation, Scranton Mtn. Mbr.
Otw
Taine Mtn. Formation, Wildcat Mbr.
Otwv
Whigville Mbr.
Ow
Walloomsac Schist
Owm
Peraluminous Granite
Pn
Narragansett Pier Granite
Pp
porphyry
Ppa
Pinewood Adamallite
Pw
Westerly Granite
Pzmy
mylonite along Paleozoic faults
Unconsolidated Sed.
Qal
Unconsolidated sediments
Sbc
Clough Quartzite
Sbf
Fitch Formation
SObu
Bigelow Brook Fm., upper member
SOh
Hebron Gneiss (Hebron Formation)
SOh+Ota+Otaf+Otay+SObu
(See SOh, Ota, Otaf, Otay, SObu)
SOsp
Southbridge Formation
Stb
Straits Schist
Trnh
New Haven Arkose
Trnh+Jb
(See Trnh and Jb)
Trnh+Jsm+Jta
(See Trnh, Jsm, and Jta)
Ultramafic Rocks
u
Ultramafic rock
Yg
granitic gneiss, gneiss, and schist
Yga
augen gneiss
Ygh
hornblende gneiss and amphibolite
Ygn
gneiss
Ygr
Ygr+Yga
(See Ygr and Yga)
Ygs
mica schist and gneiss porphyroclasts
Avalon Granite
Zl
Sterling Plutonic Suite (Group), LightHouse Gneiss
Zp
Plainfield Formation
Zp+Zsc+Pn
(See Zp, Zsc, and Pn)
Zp+Zsph+Pn
(See Zp, Zsph, and Pn)
Zp+Zsph+Pn?
Zpq
Quartzite unit in Plainfield Formation
Zsc+Pn+Zw
(See Zsc, Pn and Zw)
Zsh
Hope Valley Alaskite Gneiss
Zsh+Pnm
(See Zsh and Pnm)
Zsph
Sterling Plutonic Suite, Potter Hill Granite
Zsph+Pn
Zss
Scituate Granite Gneiss
Zw
Waterford Group
Zw+Zb
Zwm
Waterford Group: Mamacoke Formation
Zwn
Waterford Group, New London Gneiss
Zwnj
Zwr
Waterford Group, Rope Ferry Gneiss
Zwr+Zwm
(See Zwr and Zwm)
MA
C-bw
Braintree Argillite and Weymouth Fmargillite
C-c
Cheshire quartzite
C-c+C-Zd
(See C-c and C-Zd)
C-g
Green Lodge Fm of Rhodes and Graves(1931)
C-h
Hoppin Fm
C-hh
Hatch Hill Formation
C-sa
Stockbridge Fm
C-sb
C-sc
calcitic dolomite marble
C-Zcm
Canaan Mountain Fm
C-Zd
Dalton Fm
C-Zdbs
C-Zdbs+C-Zd
(See C-Zdbs and C-Zd)
C-Zdc
C-Zdq
C-Zds
C-Zev
Everett Fm
C-Zev+Ow
Part of Everett and Walloomsac formations
C-Zevc
C-Zg
Greylock Schist
C-Zga
C-Zh
Hoosac Fm; undifferentiated
C-Zhd
Hoosac Fm
C-Zhdc
C-Zhg
C-Zhga
C-Zhgt
lustrous greenish-gray schist
C-Zhr
C-Zn
Nassau Fm
C-Zna
C-Zngy
C-Znp
C-Znr
Nassau Fm; Rensselaer Graywacke member
C-Znv
Dbi
Belchertown Complex
Dbmdg
Dbp
Dbt
Dcgr
Chelmsford granite
Dchgr
Coys Hill porphyritic granite gneiss
Dchh
Dcygr
Cherry Hill Granite
Ddi
Hardwick Tonalite
Ddi+Ddn
Ddn
Erving Fm
Dea
Deg
Dev
Dfgd
Fitchburg Complex
Dfgds
Dfgr
Dfgrg
Waits River-Gile Mtn.
Dg
Goshen Fm
Calcpelite
Dgc
Dgd
Granodiorite
Dgl
Dgm
Gile Mountain Fm
Dgm+Dgma
Dgma
Dgq
Dgr
Biotite-muscovite granite, slightly foliated
Dgu
Dgu+Dga
(See Dgu and Dga)
Dhgr
Dht
DI
Littleton Fm
Dl+Ops
(See Dl and Ops)
Dlf
Dlm
Dlo
Dmg
Middlefield Granite
Dpe
Feldspar-quartz-muscovite pegmatite
Dpgb
Prescott Complex
Dpgg
Prescott Complex; Cooleyville granitic gneiss
Dpgr
Peabody Granite
Dpv
Putney volcanics;
Drgr
Granite of Rattlesnake Hill
Drh
Biotite-garnet-feldspar gneiss of Ragged Hill
DSdi
Diorite and tonalite
Felsic Volcanics
DSn
Newbury Volcanic Complex
DSna
DSnl
DSnr
Worcester Fm
Dw
Wenham Monzonite
Dwa
Waits River Fm
Dwgd
Williamsburg Granodiorite
Dwm
DZl
Lynn Volcanic Complex
gb
Hornblende-olivine gabbro
gf
gr
Granite, mostly non-foliated
grg
Biotite granitic gneiss
hg
Hornblende plagioclase gneiss
igd
Granodiorite of the Indian head pluton
Jd
Diabase dikes and sills
Jdb
Deerfield Basalt
Je
East Berlin Fm
Jgb
Granby Basaltic Tuff
Jhab
Jhb
Jmc
Mount Toby Fm
Jmg
Jn
Portland Formation
Jpc
Portland Formation (western part)
Js
Sugarloaf Fm
Jsi
Silicified fault-breccia or strongly silified metamorphic r
Jsmc
Jt
Turner Falls Sandstone
Jtc
K
Cretaceous sediments
mgr
Light-gray muscovite granite
Oa
Ammonoosuc Volcanics
Oau
Oca
Cobble Mtn. Fm
Ocb
Ocbr
Occa
Oco
Collinsville Fm
Ocoa1
OCr
OCra
OCrc
Ogd
Diorite at Golf Ledges
Ogr
muscovite-biotite granite and granodiorite
Hawley Fm
Ohg
Ohpg
Gneiss at Hallockville Pond
Om+C-Zd+O-cr
(See Om, C-Zd, O-cr)
Moretown Fm
Oma
Omsc
Ongb
Nahant Gabbro and gabbro at Salem Neck
Opa
Partridge Fm
Opau
Opbg
Opc
Pauchaug Gneiss
Opf
Ops
Ops+Sc
(See Ops and Sc)
Opsa
Opsg
Opu
Opv
Ose+Osg+C-sb+C-sa
(See Ose, Osg, C-sb, C-sa)
Osg
Otb
Tectonic breccia
Otbl
Otr
White, magnetite-bearing alaskite and trondhjemite
Walloomsac Fm
Owl
Owq
OZf
Fish Brook Gneiss
OZfm
Fourmile Gneiss
OZfmq
OZm
Marlboro Fm
OZma
Massabesic Gneiss Complex
OZmg
OZmo
OZmoa
Nashoba Fm
OZmou
OZn
OZnb
OZsh
Shawsheen Gneiss
OZt
Tatnic Hill Fm
OZtf
Tatnic Hill Fm; Fly Pond Mbr
OZty
Tatnic Hill Fm; Yantic Mbr
OZu
Serpentinized peridotite stocks
Pcm
Coal Mine Brook Fm
Narragansett Basin
Narragansett Basin Sed.
Pd
Dighton Conglomerate
Pgr
Biotite granite, with magnetite-bearing pegmatite
Ph
Harvard Conglomerate
Pondville Conglomerate
Pr
Rhode Island Fm
Prc
Wamsutta Fm
Pwv
PZb
Bellingham Conglomerate
PzZc
Cambridge Argillite
PzZr
Roxbury Conglomerate
PzZrb
qd
Quartz diorite
Sacgr
Ayer Granite
Sagr
Sb
Berwick Fm
Sbs
Sc
Se
Eliot Fm
Sf
Fitch Fm
Sfs
Sfss
Sgr
Rusty-weathering biotite granite to granodiorite
Sngr
Newburyport Complex
So
Oakdale Fm
SOad
Ayer Granite--Devens-Long Pond facies
SOagr
Andover Granite
SObgr
Blue Hill Granite
SObo
Bolyston Schist
SOcb
Cape Ann Complex: Beverly Syenite
SOcgr
Cape Ann Complex
SOcsm
Cape Ann Complex: Squam Granite
SOngd
SOqgr
Quincy Granite
SOvh
Vaughn Hills Quartzite
Sp
Paxton Fm
Spa
Spqr
Spsq
Spss
Ssaqd
Straw Hollow Diorite and Assabet Quartz Diorite
Ssqd
Sharpners Pond Diorite
St
Tower Hill Quartzite
Sts
SZtb
Tadmuck Brook Schist
TRe
Red arkosic conglomerate, sandstone, and siltstone
Trn+Trs
Serpentinite and/or talc rock
Yag
hornblende-biotite-plagioclase gneiss and amphibolite
Yb
biotite-plagioclase-quartz gneiss
Ycs
Calc-silicate granofels and gneiss
Yfg
felsic biotite-microline-plagioclase-quartz gneiss
Ygg
Granitoid gneiss
Yhb
Well-layered hornblende-biotite gneiss
Yl
Lee Gneiss
Ysg
Stamford granite Gneiss
Ysg+Yb+Ow+   C-c+C-Zd
(See Ysg, Yb, Ow, c-c, C-Zd)
Ytg
Tryingham Gneiss
Yw
Washingotn Gneiss
Yw+Yb
(See Yw and Yb)
Ywb
Washington Gneiss
Ywb+Ygg+Yw
(See Ywb, Ygg, and Yw)
Ywcs
Ywhg
Zagr
Alaskite--mafic-poor gneissic granite
Zb
Blackstone Group
Zd
Biotite-hornblende mafic dikes
Zdgr
Dedham Granite
Zdh
Dry Hill Gneiss
Zdh+Zpmg+Zpd
(See Zdh, Zpmg, Zpd)
Zdhs
Zdi
Diorite--hornblende diorite
Zdigb
Diorite and gabbro
Zdngr
Zdpq
Dry Hill Gneiss; Pelham Quartzite Mbr
Zegr
Esmond Granite
Zfgr
Granite of the Fall River pluton
Zgb
Gabbro
Zgg
Granite, gneiss, and schist
Zgmgd
Grant Mills Granodiorite
Zgn
Biotite gneiss near New Bedford feldspathic gneiss
Zgr
Biotite granite
Zgs
Gneiss and schist near New Bedford hornblende
Zhg
Zm
Mattapan Volcanic Complex
Zmgd
Milford Granite
Zmgr
Zmm
Mount Mineral Fm
Zmmu
Plainfield Fm
Zpg
Ponaganset Gneiss
Zpgr
Porphyritic granite
Zpm
Poplar Mountain Gneiss
Zrdi
Diorite at Rowley
Zsg
Zssy
Sharon Syenite
Ztgd
Topsfield Granodiorite
Zv
Metamorphosed mafic to felsic flow
Zvf
Metamorphosed felsic metavolcanic rocks
Westboro Fm
Zwgr
Westwood Granite
ME
C1
C1(m)
Muscovite-biotite granite
C1b(m)
Biotite-muscovite granite
Alkali Granite
C4a
Alkali-feldspar quartz syenite
C6
C7
Syenite
C9
Gabbro, diorite, or ultramafic rocks
C9c
Ultramafic rocks
C-clf
Caucomgomoc Lake Fm
C-clg
CDs
Unnamed comglomerates and sandstones
C-gp
Grand Pitch Fm
Hurricane Mtn Fm
C-ha
C-hmg
C-hpx
C-hq
C-hqw
C-hr
C-j
Jim Pond Fm
C-jf
C-jg
C-jk
C-jp
C-jq
C-ls
Loon Stream Fm
C-uvm
Unnamed mafic volcanic rocks
D1
Granite
Coastal Maine
D1(h)
D1(m)
D1(p)
Granite; pyroxene plus hornblende inclusions
D1(x)
D1(y)
Granite; granophyric inclusions
D1(z)
Granite; intrusive breccia
D10(h)
Foid-bearing biotite-hornblendesyenite
D1-2
Biotite-hornblende granite
D1-4c
Granite to quartz monzonite
D1-6
Granite to quartz diorite
D1a
Alkali feldspar granite
D1b
D1b(h)
D1b(m)
D2
D2(h)
Hornblende-biotite granodiorite
D2(m)
Muscovite-biotite granodiorite
D2-4b
Granodiorite to quartz diorite
D2-5
Granodiorite to quartz monzodiorite
D2-D6
D3
Tonalite
D4c
Quartz monzonite
D4c(h)
Quartz monzonite; hornblende intrusions
D4c(m)
Muscovite-biotite quartz monzonite
D5-6
Quartz monzodiorite and pyroxene-biotitequartz diorite
D6(h)
Quartz diorite; hornblende intrusions
D7
D7(p)
Syenite; pyroxene plus hornblende intrusions
D7-8
Syenite to monzodiorite
D8
Monzodiorite
D9
Gabbro, diorite, and ultramafic rocks
D9a
Diorite
D9b
D9b-c
Gabbro to ultramafic rocks
D9-D6
Gabbro to ultramafic rocks; quartz diorite
Db
Beck Pond Limestone
Carrabassett Fm
Dc?
Dch
Chapman Sandstone
Dcm
Carrabassett Fm: Massive pelite member
Dcq
Carrabassett Fm: Quartzite member
Dcs
Carrabassett Fm: Thinly layered member
DC-us
Unnamed sedimentary rocks
Deb
Eastport Fm; basalt member
Deh
Edmunds Hill Andesite
Eastport Fm; mafic to felsic volcanic member
Dh
Hildreths Formation
Dhb
Hobbstown Formation
Dhd
Hedgehog Fm
Dhm
Heald Mtn Rhyolite
Dhmd
Dhr
Hartin Fm.
Dim
Ironbound Mountain Formation
Mapleton Fm.
Matagamon Sandstone
DOb
Bucksport Formation
DOdg
Digdeguash Fm.
DOf
Flume Ridge Fm.
DOs
Spruce Top Greenstone
DOup
Unnamed pelite
DOv
Undifferentiated mafic to felsic volcanic rocks
Dpb
Perry Fm; basalt member
Dpk
Parker Bog Formation
Dpss
Perry Fm; sandstone member
Ds
Seboomook Formation
DSas
Allagash Lake Fm; mixed sedimentary rocks
DSav
Allagash Lake Fm; basalt and mixed sedimentary rocks
Dsb
Swanback Fm.
DSbbc
Bell Brook Fm; conglomerate member
DSbbs
Bell Brook Fm; pelite member
DSbh
Bar Harbor Fm.
Dsc
Seboomook Fm: Camera Hill Greenstone
DSca
Castine Fm.
DScd
Calderwood Fm.
Dscg
Unnamed conglomerate
Dsd
Seboomook Fm: Day Mountain Member
Dsdc
Dsdl
DSfh
Fogelin Hill Fm.
DSfp
Frost Pond Shale
DSfrl
Fish River Lake Fm.
DSm
Madrid Formation
Dsm
DSmig
Undiff. sed. rks ext. migmatization
Dsq
Seboomook Fm; unnamed quartzite
DSra
Rindgemere Formation: Upper member
DSrb
Rindgemere Formation: Lower member
DSrbl
Rindgemere Fm: Lower member
DSrbr
Spider Lake,Chandler Pond, and Third Lake Formations
Seboomook Fm: Temple Stream Member
DStc
Towow Fm: Conglomerate member
DStf
Thorofare Andesite
DSuc
Dsug
Seboomook Fm; unnamed mafic greenstone
Dsup
Seboomook Fm; unnamed pelite
DSus
DSuss
Unnamed conglomeratic sandstone
DSuv
Unnamed volcanic rocks
DSv
Spider Lake and Chandler Pong Formations
DSvh
Vinalhaven rhyolite
Dt
Tarratine Formation
Dtm
Tarratine Fm: Misery Quartzite
Dtmc
Tarratine Fm: McKenny Pond Limestone
Dto
Tomhegan Formation
Dtokc
Tomhegan Fm: Kineo Rhyolite Member
Dtokg
Dtokm
Dtrb
Traveler Rhyolite; Black Cat Mbr.
Dtrp
Traveler Rhyolite; Pogy Mbr.
Dtv
Trout Valley Fm.
Duc
Dulc
Unnamed limestone comglomerate
Dup
Durg
Unnamed garnet rhyolite
Dury
Unnamed rhyolite
Dus
Duss
Unnamed lithic sandstone and conglomerate
Duvm
Whiskey Quartzite
DZar
Appleton Ridge Fm.
DZg
Gonic Formation
J1
K(z)
Calcareous feldspathic sandstone; intrusive breccia
K1
Calcareous feldspathic sandstone; granite
K1a
Alkali-feldspar granite
K1b
K4a
K5
K6-9
Quartz diorite and gabbro, diorite, andultramafic rocks
K7a
Alkali-feldspar syenite
K8
K9
Kv
Mafic to felsic volcanic rocks
Mz1(h)
Hornblende-biotite granite
Mz10
Foid-bearing syenite
Mz7
Mz7a
Mz9
Mzv
O1
O1b
O1b-2
Alkali-feldspar granite andgranodiorite
O2
O4c(h)
Hornblende-biotite quartz monzonite
O6(h)
Argillaceous limestone and/or dolostone
O9
Oam
Obb
Blind Brook Fm.
Obh
Benner Hill Fm.
Obhg
Benner Hill fm;
Obl
Belle Lake Slate
Obp
Bluffer Pond Fm.
Obpr
Bluffer Pond Fm;
OC-b
Mount Battie Fm.
OC-c
Cookson Fm.
OC-cb
Chase Brook Fm.
OC-cqr
Cookson Fm
OC-cr
OC-css
OC-cv
OC-d
Dead River Fm
OC-dp
Dead River Fm: Lower member
OC-dq
Dead River Fm: Upper member
OC-hm
Hurd Mountain Fm.
Ocl
Chase Lake Fm.
Oclc
Chase Lake Fm
Ocls
OC-me
Megunticook Fm
OC-mel
OC-p
Penobscot Fm
OC-pg
OC-pmig
Ocr
Chandler Ridge Fm
Sawmill Fm
OC-sc
Southeast Cove Fm
OC-sd
Saint Daniel Fm
OC-us
OC-uv
OC-z
Aziscohos Formation
Odmp
Odms
Odmv
Odw
Dry Wall volcanic rocks
Ohh
Holmes Hole Fm.
Ok
Kennebec Fm
Okmg
Kamankeag Fm
Okms
Kamandeag Fm
Olm
Lobster Mountain Vol. Complex
Olma
Lobster Mtn Vol.
Olmb
Madawaska Lake Fm.
Oml
Munsungun Lake Fm.
Opm
Pile Mountain Argillite
Quimby Formation
Oqg
Quimby Fm
Oqs
Oqv
Osb
Shin Brook Fm
Oup
Our
Unnamed sulfidic pelite
Ous
Unnamed sandstone and pelite
Ouss
Unnamed sandstone
Oussp
Unnamed quartz sandstone and pelite
Ouv
Ouvf
Unnamed felsic volcanic rocks
Ouvm
Ouvs
Unnamed volcanic and sedimentary rocks
Winterville Fm.
Owc
Wassataquoik Chert
OZc
Cushing Formation
OZce
Cape Elizabeth Fm
OZceq
OZcev
OZcf
Columbia Falls Fm
OZcg
Cushing Fm
OZcl
OZcq
OZcr
OZe
Ellsworth Fm
OZef
OZev
OZj
Jewell Formation
Macworth Formation
OZpg
Passagassawakeag block
OZpgl
OZpgs
OZs
Spring Point Formation
OZsc
Scarboro and Diamond Island Formations
OZsk
Spurwink Limestone
OZus
pC-c
Gneisses: Chain Lakes Massif
S1
S9
S9c
Sak
Ames Knob Fm
Sbb
Burnt Brook Fm
Capens Formation
Scgu
Allsbury Fm
Sdb
Dennys Fm
Sdv
Edmunds Fm
Frenchville Fm
Sfm
Rocks of the Fivemile Brook Sequence
Sfmg
Greenstone of the Fivemile Brook Sequence
Sg
Greenvale Cove Formation
Sh
Hersey Fm
Shm
Hardwood Mountain Formation
Sj
Jemtland Fm
Slb
Leighton Fm
Slv
Smm
Maple Mountain Fm
Sns
New Sweden Fm
Oak Bay Fm
SOar
Aroostook River Fm
SOcm
Carys Mill Fm
SOcml
SOcms
SOdb
Dunn Brook Fm
SOf
Frontenac Formation
SOfc
Frontenac Fm: Canada Falls Volcanic Mbr
SOlb
Lobster Lake Fm
SOm
Mattawamkeag Fm
SOmh
Mars Hill Conglomerate
SOn
Nine Lake Fm.
SOuc
SOup
SOur
SOus
SOuv
SOv
Vassalboro Fm
SOvv
Perry Mountain Fm
Spu
Sqp
Quoddy Fm
Sqv
Sqvu
Sr
Rangeley Fm
Sra
Rangely Fm: 'A' member
Srac
Srb
Rangely Fm: 'B' member
Src
Rangely Fm: 'C' member
Srm
Rocky Mountain quartz latite
Srp
Ripogenus Fm
Ss
Sangerville Fm
Ssa
Ssal
Ssar
Ssc
Ssf
Smalls Falls Fm
Ssf?
Ssl
Ssm
Smyrna Mills Fm
Sspm
Sangerville Fm; Patch Mountain Member
Sspr
Spragueville Fm
Ssr
Ssu
Stf
The Forks Fm
Suc
Sucs
Sul
Unnamed limestone
Sur
Sus
Suss
Suvm
Suvs
Sw
Waterville Fm
Swb
West Branch volcanic rocks
Swl
SZ9c
Ultramafic rocks, fold-bearing syenite
SZb
Berwick Formation
SZe
Eliot Formation
SZk
Kittery Formation
Zcb
Coombs Limestone
Zi
Rocks of Islesboro
Zil
Rocks of Islesboro; limestone
Znh
North Haven Fm
Zop
Ogier Point Fm
Zr
Rye Fm
Zrk
Rockport Fm
NH
Hurricane Mtn. Fm
C-jb
Pink equigranular biotite granite
D1m
Two-mica granite of northern and southeastern NH
D2b
Porphyritic biotitie granodiorite
D3Ab
Biotite tonalite
D3Bb
Biotite trondhjemite in Rumney Quadrangle
D6
Biotite quartz diorite in northeastern NH
Db2b
Bethlehem Granodiorite
Dc1m
Concord Granite
Dc3Am
Two-mica tonalite
De9
Exeter Diorite
Dgv
Di
Ironbound Mtn Fm
Dib
Die
Dif
Dih
Ironbound Mt Fm; Grits at Halls Stream in northern NH
Dir
Dk2x
NH PS: Kinsman Granodiorite
Dl+Sc
(See Dl and Sc descriptions)
Dlc
Dlcs
Dll
Dlu
Dlv
Dlvb
Dlvs
Ds1-6
Spaulding Tonalite
Ds1-6+Dc1m
(See Ds1-6 and Dc1m descriptions)
Ds6-9B
Hypersthene-biotite quartz diorite
DS9
Metamorphosed gabbro, diorite, andintrusive basalt dikes
DSlr
Migmatitic rocks
Dw3A
Winnipesaukee Tonalite
J1-4l
Leuocratic granite to quartz syenite
J1a
Mount Osceola Granite
J1h
Hastingsite granite
J1hx
Granite porphyry
J1O
Nepheline-sodalite-hastingsite syenite
J1r
Mesoperthitic granite
J1x
J4h
Hornblende or alkalic amphibolequartz syenite
J4hx
Porphyritic hornblende or alkalicamphibole quartz syenite
J4x
Quartz syenite
J5
Hornblende-biotite quartzmonzodiorite
J7h
Hornblende (or alkalic amphibole)syenite
J7x
Porphyritic syenite
J8
Augite monzodiorite
J9A
J9Ah
Porphyritic hornblende diorite
J9B
Jc1b
Conway Granite--mesoperthic biotitegranite
Jmv
Moat Volcanics
Jo1b
Jo1h
Rhyolite and fine-grained granite
K1bx
Porphyritic biotite granite
K1r
Mesoperthitic granite, withriebeckite and(or) hastingsite
K2
Biotite-hornblende granodiorite
K4x
Large mesoperthitic phenocrysts inquartz syenite of "Albany
K7C
Augite-hornblende-biotite monzonite
K9A
Hornblende diorite
K9AB
Augite hornblende diorite and gabbro
K9B
Augite-hornblende-biotite gabbro
Kc1b
Mesoperthic biotite granite
Basalt, minor rhyolite ignimbriteand andesitic tuff
MD1m
Two-mica granite
MD3B
Trondhjemite and abundant pegmatite
Oal
Oalb
Oalg
Oali
Oals
Oalx
Oalx+O-Cd
(See Oalx and O-Cd descriptions)
Oaus
Amoonoosuc Volcanics
Oaux
Amoonoosuc Volcancs
Oc1b
Biotite granite (Cambridge Black pluton)
Oc3Ah
Hornblende-biotite tonalite
Oc3Ax
Porphyritic phase of hornblende-biotite tonalite
Oc9B
Gabbro and diabase
O-Cd
O-Cdp
O-Czl
Aziscohos Fm
O-Czu
Oh2-9a
Highlandcroft Plutonic Suite
Oh2h
Oj3A
Oo1-3A
granite, granodiorite, and tonalite
Oo1-3B
granite, granodiorite, and trondhjemite
Oo1b
Oo1bx
Porphyritic (alkalic feldspar)biotite granite
Oo1h
hornblende-biotite granite
Oo2-3A
Granodiorite to tonalite
Oo2b
Biotite granodiorite
Oo2bx
Porphyritic biotite granodioritein no. Jefferson dome
Oo2h
Hornblende granodiorite
Oo3B
Trondhjemite
Oo3B-6
Trondhjemite and quartz diorite inno. Jefferson dome
Oo4-7h
Hornblende-biotite quartz syenite to syenite
Oo4Ch
Hornblende quartz monzonite
Oo9B
Hornblende gabbro
Opvi
OZrb
Rye Complex: Breakfast Hill Granite
OZrz
Rye Complex
P1m
Gray biotite granite
PM1m
Two-mica granite of the Sebagobatholith and Effingham pluto
S1b
Biotite granite stock and dikes
Sa2x
Ayer Granodiorite
Sfc
Fitch and Clough Fm
Sfc+Db2b
(See Sfc and Db2b descriptions)
Sfr
Frontenac Fm
Sfrb
Sfrc
Sfrg
Sfrv
Sfrx
Greenvale Cove Fm
Sm
Madrid Fm
Smsf
Madrid and Smalls Falls Fms
Sn1x
NH PS: Newburyport Complex
Sn2-3A
SOb
SObc
SObg
SOe
SOec
SOk
Kittery Fm
Perry Mtn Fm
Spr
Perry Mtn and Rangely Fms
Spvs
Rangely Fm
Srl
Rangely Fm: Lower part
Srlp
Sru
Rangely Fm: Upper part
Srup
Srvf
Ssfb
Ssfc
Ssff
Ssfx
Zmz
RI
Cpc+OCcj
Pirates Cove Fm. & Jamestwon Fm.
Dsa
Scituate Igneous Suite
Dsfg
Dsg
Dsgd
Dsr
Dsv
DZc
Cumberlandite
DZgd
gabbro/diorite
Jm
monchiquite
Kr
Raritan Fm
MDca
alkali-feldspar granite of Cumberland
OC-cdi
Conanicut Grp: Dutch Island Harbor Fm
OC-cep
Conanicut Grp: East Passage Fm
OC-cfb
Conanicut Grp: Fort Burnside Fm
OC-cj
Conanicut Grp: Jamestown Fm
OC-cj+OC-cfb
OC-cu
Conanicut Grp; undifferentiated
OC-m
Minette
Pnbd
Narragansett Bay Grp
Pnbpo
Pnbpu
Pnbr
Pnbs
Pnbw
Pnfg
Narr. Pier Plut. Ste
Png
Pnlg
Pnpg
PZmc
Metaclastic rock, undivided
Quaternary sediments
Td
Diabase
Tvq
Vein quartz
Zbm
Blackstone Grp
Zbq
Zbs
Zbu
Zeag
Esmond Igneous Suite
Zefg
Zefv
Zeg
Zegd
Zegg
Zem
Zha
Harmony Grp: Absalona Fm
Zhn
Harmony Grp: Nipsachuck Fm
Zhw
Harmony Grp: Woonasquatucket Fm
Zms
mica schist
Znfa
Newport Grp: Fort Adams Fm
Znnn
Newport Grp: Newport Neck Fm
Znpn
Newport Grp: Price Neck Fm
Zsag
Sterling Plutonic Grp
Zseg
Granites of SE RI
Zsepg
Zsgg
Zsmg
Waterford Gr: Mamacoke Fm
Waterford Grp: Rope Ferry Gneiss
VT
C-bh
Bridgeman Hill Fm.
C-br
Breeze Fm
C-brc
Chesire Quartzite
C-cg
Bull Hill Gniess
C-cm
Cavendish Fm
C-cr
Cavendish Fm, Readsboro Mbr.
C-cs
Clarendon Springs, Ticonderoga, and Rock River dolomites
C-cs+C-w
(See C-cs amd C-w)
C-d
Dunham dolomite
C-da
Danby and Potsdam formations
C-dt
C-f
Forestdale marble
Hazens Notch Fm
C-hb
Hazens Notch Fm; Belvidere Mtn. amphibolite member
C-hg
C-hm
C-ho
C-hog
C-ht
Hoosac Fm, Turkey Mtn. Mbr.
C-hw
Hatch Hill and West Castleton formations
C-m
Monkton quartzite
C-m+C-d
(See C-m and C-w)
C-mo
Moosalamoo phyllite
C-o
Ottauquechee Fm
C-og
C-p
Pinnacle Fm
C-p+C-ho
(See C-p and C-ho)
Omm+C-o
C-pa
Parker slate
C-pc
Pinney Hollow Fm
C-pg
C-pgc
Pinney Hollow Fm, Chester amphibolite mbr.
C-ph
C-pt
Pinnacle Fm; Tibbit Hill volcanic member
C-rb
Rugg Brook Fm
C-s
Sweetsburg Fm
Sweetsburg Fm; St. Albans slate member
Saxe Brook dolomite
C-sbc
St. Catherine Fm
C-scz
C-sh
C-sr
C-ssm
C-t
Tyson Fm.
C-u
Underhill Fm.
C-ua
Underhill Fm, Mount Abraham schist member
C-ub
Underhill Fm, Battell Mbr.
C-uc
Underhill Fm
C-ufb
Underhill Fm; Foot Brook Mbr.
C-ufp
Underhill Fm.; Fairfield Pong Mbr.
C-ug
C-uj
Underhill Fm.; Jay Peak Mbr
C-up
Underhill Fm.; Peaked Mountain Mbr
C-uw
Underhill Fm.; White Brook Mbr.
C-w
Winooski dolomite
Gile Mtn. Fm
Dga
Dgh
Gile Mtn. Fm, Hall Stream Mbr
Gile Mtn. Fm, Meetinghouse Slate Mbr
Northfield Fm
Waits River Fm.; Ayers Cliff limestone Mbr
Dwb
Waits River Fm.; Barton River Mbr
Dwc
Waits River Fm, Crow Hill Mbr
Dws
Waits River Fm, Standing Volcanic Pond Mbr
hu
undifferentiated granitic rocks
nhb
Bethlehem gneiss
nhd
Metadiorite
nhu
Undifferentiated granitic rock
nhu+Omhb
(See nhu and Omhb)
Amonoosuc Volcanics
Albee Formation
Bascom Fm., and Luke Hill, Naylor Ledge,and Hastings Creek
Cutting dolomite, and Morgan Corner andWallace Creek format
Chipman, Bridport, and Beldens Fm.; Providence Island dolom
Ocbe
Cumberland Head Fm
Stowe Formation
Stowe Fm
OC-sg
OC-sg+us
(See OC-sg and us)
OC-u
Pinney Hollow Ottauquechee Fm, and Stowe Formations
Ocw
Chipman, Bridport, and Beldens Fm.; Providence Islanddolomi
Glens Falls Fm.; Larrabee Mbr
Ogo
Glens Falls and Orwell limestone
Ogs
Glens Falls Fm.; Shoreham Mbr.
Hortonville Fm
Oha
Hathaway Fm
Hortonville, or Cumberland Head, and Glens Falls formations
Ohi
Highgate Fm
Oi
Iberville Fm
Omb
Missisquoi Fm, Barnard Volcanic Mbr
Omc
Missisquoi Fm
Omco
Missisquoi Fm; Coburn Hill Volcanic Mbr
Omcr
Missisquoi  Fm, Cram Hill Mbr
Omh
Mount Hamiltion Fm
Omhb
Missisquoi Fm.; Harlow Bridge quartzite member
Omi
Middlebury and Chazy limestone;  Youngman and Carman format
Omic
Middlebury and Chazy limestone.
Omid
Middlebury and Chazy limestone
Omiv
Omiv+Omid+Om
(See Omiv, Omid, Om)
Morses Line Fm
Missisquoi Fm, Moretown Mbr
Missisquoi Fm.; Umbrella Hill Mbr
Omw
Missisquoi Fm, Whetstone Hill, Mbr
Orwell limestone, and Isle La Motte and Lowville limestones
Oof
Orfordville Fm
Oop
Orfordville Fm, Post Volcanic Pond Mbr
Oor
Oos
Orfordville Fm.; Sunday Mountain volcanics
Pawlet Fm
Os
Shelburne, Whitehall, and Strites Pond formations
Osp
Stony Point Fm
Osp+Oi
(See Osp and Oi)
ou
Biotite quartz diorite gneiss
pC
Mount Holly Complex
pCg
gneissic biotite granite, quartz monzonite,and granodiorite
pCgn
gneiss, quartzite, calc-silicate granulite
pCm
pCsg
Stamford gneiss
pCsq
Mount Holly Complex, quartzite mbr
pCsq+C-t
(See pCsq and C-t)
Clough Fm
Shaw Mtn. Fm. (south of 44 degrees latitude)
udp
Dunite, peridotite, and serpentinite
us
Serpentinite, carbonate rock, talc-carbonate rock, and stea
uu
Undifferentiated ultramafic rocks
wd
Hornblende-biotite diorite; gabbro
we
Essexite
wg
Biotite and hornblende granites
wle
Bostonite
wn
Nepheline syenite and pulaskite
ws
Hornblende, biotite, quartz, and augite syenites
wv
Volcanic breccia, felsitic tuft, and flows