Susquehanna Group Continued
Catskill Formation-Continued Zone E-Continued
75. Sandstone, brownish-gray, fine-grained, micaceous, limy, poorly sorted____
74. Claystone, brownish-gray; basal contact sharp, even_-_- 73. Sandstone, greenish-gray, fine-grained_‒‒‒‒
72. Sandstone, greenish-gray, medium-grained, crossbedded; some grayish-red mica_-_.
71. Sandstone, greenish-gray, fine-grained, micaceous, cross- bedded..
sorted; conglomerate lenses containing quartz pebbles as much as 1⁄2 in. long---
69. Sandstone, greenish-gray, medium-grained; grades up- ward to coarse-grained sandstone containing clay pebbles----
68. Sandstone, greenish-gray, limy; fine-grained at base, grading upward to coarse grained; quartz pebbles as much as 1⁄2 in. in diameter___.
67. Sandstone, greenish-gray, fine-grained to very fine grained, crossbedded; contains limy "glomerate" lenses in upper part; basal contact sharp------ 66. Siltstone, grayish-brown, micaceous, clayey, subfissile; beds as much as 2 in. thick; plant debris; several limy sandstone lenses; locally crossbedded "glomerate" bed at base; upper surface fluted____.
65. Sandstone, greenish-gray, very fine to fine-grained, very micaceous, locally ironstained; beds 4-2 in. thick; slightly crossbedded in long sweeps; grades to grayish brown in upper 11⁄2 ft; basal contact sharp, conformable
64. Claystone, grayish-brown, fissile to indistinctly bedded; sandstone lenses---
63. Claystone, greenish-gray, fissile to indistinctly bedded, micaceous; weak unit_---
62. Sandstone, greenish-gray, fine-grained micaceous, well- sorted; beds 1 in. thick; incipient crossbeds; about one- third of beds in lower 20 ft are lenticular, limy, "pock marked"
61. Claystone, grayish-brown, silty, micaceous, locally limy; 1 or 2 "glomerate" lenses; 2 lenticular sandstone beds; grades downward to very fine grained sandstone in lower 2 ft.___.
60. Claystone, grayish-brown, silty, locally limy; basal con- tact gradational_____
59. Sandstone, grayish-brown, very fine grained, micaceous; limy zone 2 ft thick at base; lenticular; resistant to weathering
Susquehanna Group-Continued
Catskill Formation-Continued Zone D-Continued
58. Claystone, grayish-brown, silty, micaceous; limy in part ; very fine grained brownish-gray sandstone lenses___ 57. Claystone, grayish-brown, silty, poorly bedded; several lenticular "pock-marked" limy zones; basal contact gradational..
56. Sandstone; greenish gray in lower 5 ft, brownish gray in upper 9 ft; very fine grained; sparse incipient crossbeds__
55. Claystone, grayish-brown, and grayish-brown siltstone interfingering with greenish-gray very fine grained sandstone and long "glomerate" lenses that contain a few clay pebbles____
54. Sandstone; greenish gray in basal 5 ft grading upward to grayish brown in upper 6 ft; very fine grained; beds flaggy; some crossbedding___.
53. Claystone, grayish-brown, silty, fissile; limestone nodules as much as 1 in. in diameter in several "pock-marked" limy zones; limy "glomerate" bed 2 ft thick______. 52. Sandstone, greenish-gray, fine-grained, crossbedded; beds 1-8 in. thick; limy lenses in upper half; two fissile shale lenses as much as 6 in. thick_-_-
51. Claystone, grayish-brown, silty, indistinctly bedded, micaceous; limy and "pock-marked" in upper 8 in---- 50. Sandstone, brownish-gray, very fine grained, micaceous ; beds 6-18 in. thick; slightly crossbedded---. 49. Claystone, grayish-brown, silty, fissile to indistinctly bedded, locally slightly limy; siltstone lenses---- 48. Siltstone, brownish-gray, coarse-grained, hard, massive_ 47. Claystone, grayish-brown, silty, fissile to indistinctly bedded, locally slightly limy; limy "worm-eaten" silt- stone in upper 1 ft; "wormholes" result from leaching of limestone grains that average about 5 mm long____ 46. Claystone, greenish-gray, silty, fissile, micaceous; grades upward to brownish-gray siltstone in upper 1 ft______ 45. Sandstone, brownish-gray, very fine grained, clayey, micaceous, well-sorted; beds 2-12 in. thick; basal con- tact gradational___.
44. Sandstone, greenish-gray to slightly grayish-brown, fine- grained, clayey; abundant coarse-grained mica; beds 2-12 in. thick.......
43. Claystone, grayish-brown, silty; grades upward and laterally to limy fine-grained crossbedded sandstone that contains pebbles of shale; grades to greenish-gray claystone in places----
42. Sandstone, greenish-gray, fine-grained, micaceous; a few long sweeping crossbeds; contains 2 greenish-gray claystone lenses__.
41. Claystone, grayish-brown, silty, indistinctly bedded; some interbeds of greenish-gray siltstone; limy zones..
Susquehanna Group-Continued
Catskill Formation-Continued
Zone D-Continued
40. Sandstone, greenish-gray, medium-grained, micaceous; beds indistinct, 2-6 in. thick; slightly crossbedded ; angular to subrounded grains_
39. Claystone, grayish-brown, silty; grades upward to very fine grained sandstone; slightly limy; 2 limy fine- grained sandstone lenses about 4 in. thick; weak unit. 38. Sandstone, grayish-brown, fine-grained; beds 1-4 in. thick; moderately crossbedded; slightly limy; basal contact gradational__.
37. Sandstone, greenish-gray, slightly limy; medium grained in basal 5 ft, fine grained above; beds 1-4 in. thick; moderately crossbedded; several limy and clayey "pock-marked" zones; shale chips as much as 11⁄2 in. long and poorly preserved plant debris in basal 1 ft-- 36. Sandstone, greenish-gray, fine- to medium-grained; grades upward to silty claystone in upper 11⁄2 ft; beds 3 in. thick; moderately crossbedded; limy "pock- marked" very fine grained sandstone lens as much as 8 ft thick; a few clay pebbles; resistant to weather- ing; flute casts at base___
35. Sandstone, greenish-gray, fine- to coarse-grained, mica- ceous, poorly sorted; beds 4 in. thick; incipient cross- beds; greenish-gray shale lenses 1 in.-1 ft thick; fluted casts at base; basal contact sharp, irregular___ 34. Claystone, grayish-brown; grades upward to greenish gray at top; silty, sandy, coarsely micaceous; beds fissile to indistinct; limy lens 6 ft below top; grades laterally to siltstone lenses and very fine grained sand- stone lenses; weak unit; basal contact gradational-- 33. Sandstone, brownish-gray; fine grained at base, grades upward to massive grayish-brown siltstone; basal con- tact gradational_.
32. Sandstone, greenish-gray, fine-grained; crossbedded in both long and short sweeps; angular to subangular grains; greenish-gray shale lens as much as 1 ft thick 5 ft above base; limy sandstone lens 8 in. thick con- taining clay pebbles about 3 ft above base of unit; basal contact gradational___.
31. Sandstone, greenish-gray, coarsely micaceous; scattered white quartz granules and pebbles as much as 4 in. long in a predominantly fine-grained matrix; beds in- distinct, 1-4 in. thick; crossbedded in both long and short sweeps: poorly sorted; angular to subangular grains ironstains give unit "salt-and-pepper" appear- ance; limestone and shale pebbles as much as 1 in. long in basal 1 ft; shale lens 1 ft thick 8 ft above base. County-line marker on west side of highway, at base of unit, in Ransom quadrangle___
Susquehanna Group-Continued
Catskill Formation-Continued
30. Sandstone, greenish-gray, fine-grained, slightly cross- bedded; beds 1-4 in. thick; grades into fissile siltstone in upper 1 ft; weak unit__ 29. Sandstone, greenish-gray,
fine-grained, nonbedded; weathers to knobby yellowish-green surface; coalified- plant beds as much as 2 in. thick. Unit is lens 30 ft long that is equivalent, laterally, to a “glomerate”---- 28. Claystone, greenish-gray, silty, fissile to indistinctly bedded---
27. Sandstone, greenish-gray, very fine grained, micaceous; beds 1-3 in. thick; crossbedded in lower 15 ft; forms ledge----
26. Claystone, grayish-brown, silty, indistinctly bedded; "glomerate" lens 2-3 ft thick at top weak unit‒‒‒‒‒ 25. Sandstone, greenish-gray; grades to brownish gray in upper 3 ft; very fine grained____
24. Siltstone, grayish-brown, fissile to distinctly bedded____ 23. Sandstone, greenish-gray, slightly limy, fine-grained;
beds 1-6 in. thick; slightly crossbedded; "glomerate" 5 ft thick 5 ft above base. Base of unit is at road level beneath powerline that crosses river to powerplant_-_-
22. Siltstone and claystone, grayish brown; greenish gray in upper 2 ft; "glomerate" lenses locally in upper 2 ft. 21. Sandstone, light-brownish-gray, fine-grained_.
20. Claystone, grayish-brown, silty; “glomerate" lens 6 in. thick in middle of unit..
19. Sandstone, grayish-brown, fine-grained..
18. Claystone, grayish-brown, silty---.
17. Siltstone, greenish-gray; basal contact irregular___
16. Sandstone, greenish-gray, fine-grained well-sorted; many accessory minerals; massive when fresh; beds 1-4 ft thick; basal contact sharp_---
15. Claystone, grayish-brown, silty, fissile to indistinctly bedded----
14. Siltstone, greenish-gray; "blobs" of grayish-brown clay; partly crossbedded____.
13. Sandstone, greenish-gray, very fine to fine-grained; beds 1-4 in. thick; shale and "glomerate" lens 3 ft thick 8 ft above base; "glomerates" also at 14 and 27 ft above base; crossbedded and more flaggy in upper 3 ft 12. Claystone, grayish-brown, silty; "glomerate" lens 1 ft thick at top; weak but persistent unit-------
11. Sandstone, greenish-gray, very fine grained and brown- ish-gray siltstone; beds 4-1 in. thick; micaceous, well sorted; brownish gray in upper 4 ft; basal contact sharp
10. Siltstone, grayish-brown, fissile to indistinctly bedded; few crossbeds_-_-
Susquehanna Group Continued
Catskill Formation-Continued Zone C-Continued
9. Sandstone, greenish-gray, very fine grained, well-sorted, micaceous; beds 1-6 in. thick; forms slope..
7. Shale, brownish-gray, and interbeds of greenish-gray sandstone; beds 1 in-1 ft thick; 1 shale bed 3 ft thick 3 ft below top; forms slope; partly covered_
5. Sandstone, olive-gray, very fine to fine-grained; beds 4 in. thick to massive; slightly crossbedded, mica- ceous, clayey, dirty-
4. Covered interval_._.
3. Sandstone, as in unit 5 above..
2. Covered interval..
1. Sandstone, greenish-gray, very fine to fine-grained, slightly micaceous, well-sorted; beds 4-2 in. thick; slightly crossbedded; most crossbedding in upper part; "glomerate" beds in middle; shale lenses near base, middle, and top; forms isolated ledges along slope. Unit is 50-75 percent covered in lower 25 ft. Top of unit is approximately the top of Buttermilk Creek section_____
Part of zone C measured___
Part of Catskill Formation measured__.
The Buttermilk Creek section begins at road level on the east side of the Susquehanna River at the north end of the cliff about 600 ft south of the bridge over Buttermilk Creek at Falls, Pa. The section extends up the steepest accessible part of the north end of the cliff. The upper 60 feet is the approximate stratigraphic equivalent of the lower 60 feet of the Powerline C section.
Susquehanna Group:
Catskill Formation:
24. Sandstone, greenish-gray to olive-gray, fine-grained to very fine grained; beds 4-2 in. thick; slightly cross- bedded in long sweeps; "glomerate" beds at 15 to 20 ft above base: 4-ft-thick grayish-brown siltstone unit in 14-in.-thick beds 35 ft above base; poorly exposed to partly covered in upper 20 ft----
23. Covered interval; forms slope..
22. Sandstone, olive-gray, fine-grained, micaceous; some me- dium grains in lower part; angular to subangular grains; beds 4-1 in. thick; abundant crossbedding : basal surface fluted; basal contact sharp. Base is ap- proximate stratigraphic top of Ransom A section____.
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