600 INDEX TO THE STRATIGRAPHY OF NORTH AMERICA. 



Feet. 



Porous honeycombed limestone; no fossils _. . 2 



Buff limestone, massive, weathering somewhat nodular; 2 feet at base somewhat shaly 7J 



Fine-grained sandy limestone 10 



Fine-grained sandy limestone, shaly 1 



Yellowish limestone, more massive and less sandy 4 



White clay 1 



Coarse buff limestone 4 



Oyster shells in sandy layer , 2 



Massive limestone, weathering yellow 4 



Shaly yellow limestone, nodular and full of oysters 8 



Shaly, with thin limestone layers g 



Hard, porous, dense, buff-weathering limestone IJ 



Oyster-shell breccia 3 



Clay or sand containing chalky nodules 5 



Chalky layer j 



Clay or sand containing chalky nodules 3 



Hard, dense buff limestone, shaly at bottom 5 



Nodular limestone, weathering into nodular clay 8 



Siliceous limestone 3 



Oolitic fossiliferous shaly-Weathering limestone 10 



Coarse reddish limestone 5 



White clayey limestone with shaly weathering 3 



White sandy honeycombed limestone 2 



Sandy and nodular-weathering limestone 6 



Dense dull-white limestone 1 



Nodular-weathering limestone 10 



Dense brown limestone 1 



Clayey limestone, weathering nodular 4 



Dense buff limestone, weathering nodular, with calcite films and sand grains 10 



Nodular-weathering limestone, possibly conglomerate '. 7 



Like above, but containing coarser grains of quartz 16 



Stream at bottom of slope. 



Clays, yellow, honeycombed at base 10 



Light-colored limestone, somewhat gritty; makes small bench 5 



Soft layers, covered 5 



Hard limestone 2 



Alternating hard and soft beds, clay and marly limestone, not very fossiliferous; makes small 



terraced slopes 30 



From top of slope northeast of bench mark 842. 



Sandy limestone; few fossils 5 



Sandy limestone with many shells 15 



Covered 5 



Fine sandy limestone with fossils 5 



Fine sandy limestone; not many fossils 8 



Fine-grained conglomerate, in places shaly 5 



Covered 5 



Conglomerate, weathering nodular 5 



Covered 18 



From bench, mark 843 downstream. 



Sandy conglomerate 10 



Oyster shells 1 



Sandy conglomerate 1 



Sand and sandy conglomerate 9J 



Conglomerate and oyster shells 4 



Covered 20 



409i 



