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Subsurface geology and oil and gas resources of Osage County, Oklahoma. Part 8, Parts of township 20 north, ranges 9 and 10 east, and township 21 north, ranges 8 and 9 east and all of township 21 north, range 10 east
C. T. Kirk, W. R. Dillard, Otto Leatherock, H. D. Jenkins
1941, Bulletin 900-H
The area whose subsurface geology and oil and gas resources are described in this report lies along the southern border of Osage County, Okla., and includes parts of T. 20 N., Rs. 9 and 10 E., and of T. 21 N., Rs. 8 and 9 E., and all of T....
Geologic structure and occurrence of gas in part of southwestern New York. Part 1, Structure and gas possibilities of the Oriskany sandstone in Steuben, Yates, and parts of the adjacent counties
W. H. Bradley, J. F. Pepper
1941, Bulletin 899-A
The area covered by this report is in southwestern New York and includes a little more than 3,000 square miles in Steuben and Yates counties and parts of the six adjacent counties. This area has been mapped to determine the structural attitude of the exposed rocks, so as to aid...
Geologic structure and occurrence of gas in part of southwestern New York. Part 2. Subsurface structure in part of southwestern New York and mode of occurrence of gas in the Medina group
G. B. Richardson
1941, Bulletin 899-B
Based on the records of several hundred deep wells, contour maps have been prepared showing the monoclinal structure of part of western New York, and isopach lines have been drawn showing the westward convergence of the rocks. The mode of occurrence of natural gas in the Medina group is briefly...
Geology and ground-water resources of the Lufkin area, Texas
Walter N. White, A.N. Sayre, J.F. Heuser
1941, Water Supply Paper 849-A
This report covers Angelina County, Texas, of which Lufkin is the county seat, and parts of Nacogdoches and other adjacent counties. The area is underlain by a series of sands, clays, and shales of Eocene age that dip, in general, southward at an angle a little greater than that of...
Geology of the Moreno Valley, New Mexico
L.L. Ray, J.F. Smith Jr.
1941, Geological Society of America Bulletin (52) 177-210
The Moreno Valley, located along the complex eastern boundary between the Sangre de Cristo Mountains and the Great Plains, is structurally a broad, northwardplunging syncline, disrupted by smaller folds and faults. This major synclinal structure is the result of the Laramide disturbance. Deformation, however, has continued possibly into the Quaternary....
Igneous rocks of the Highwood Mountains, Montana: Part VI. Mineralogy
E.S. Larsen, C.S. Hurlbut, Bennett Frank Buie, C.H. Burgess
1941, GSA Bulletin (52) 1841-1856
The minerals of the igneous rocks of the Highwood Mountains are described. The primary hornblende of the quartz latites is basaltic and it has been partly replaced by a common green hornblende. Hornblende is rare in the alkalic rocks. Augite is an abundant mineral of the alkalic rocks; in the...
Igneous rocks of the Highwood Mountains, Montana: Part VII. Petrology
E. S. Larsen Jr., C.S. Hurlbut, C.H. Burgess, Bennett Frank Buie
1941, GSA Bulletin (52) 1857-1868
In the shonkinite series olivine, leucite, and analcime crystallized only from magmas with over 20 per cent of mafites. At this stage the leucite and analcime inverted to pseudoleucite. Pyroxene crystallized over the whole range of rocks and changed little in composition until the magma reached the composition of nepheline...
Igneous rocks of the Highwood Mountains, Montana: Part V. Contact Metamorphism
Esper Signius Larsen Jr., Bennett Frank Buie
1941, GSA Bulletin (52) 1829-1840
Very near the contacts of the stocks the sediments have been replaced by sanidine and diopside, through magmatic reaction. An irregular zone of indurated sediments, produced largely by hydrothermal agents, extends outward from the stocks for as much as half a mile. Locally, more intense hydrothermal metamorphism has formed orthoclase...
Igneous rocks of the Highwood Mountains, Montana: Part II. The Extrusive Rocks
E. S. Larsen Jr.
1941, GSA Bulletin (52) 1733-1752
Early eruptions of quartz latites, rather rich in potash, built up a volcanic mountain over 30 miles across on an irregular surface of late Cretaceous sediments. Erosion then removed much of the quartz latite. Renewed volcanism formed a volcano made up of basaltic rocks (mafic phonolite) that covered the quartz...