Bulletin of the Geological Society of America, Volume 17The Society, 1906 - Geology Vols. 1-44 include Proceedings of the annual meeting, 1889-1933, later published separately. |
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Common terms and phrases
50 feet Algonkian Allegheny Ames limestone arenaceous argillite basal basin batholith beach belt Bighorn biotite Black shale Brookville Brush Creek calcareous Cambrian canyon coarse coast Conemaugh conglomerate correlated Cretaceous deposits Dwyka east eastern elevated erosion evidence farther fault fauna feet thick figure formation fossiliferous fossils Freeport coal bed GEOL Geological Survey glacial glacier gneiss granite granodiorite gravel gray hills horizon hornblende I. C. White inches interval J. J. Stevenson Kittanning layers limestone locality Lower Freeport Lower Kittanning Mahoning marine massive Middle Kittanning miles moraines mountains northern northwest occur Ohio Ordovician Ordovicic overlying peneplain Pennsylvania Pittsburg plate portion Pottsville present quartzite range red beds region ridge river rock Russell fiord Saint Peter sand sandstone sediments shaly shore shoreline shows siliceous slope southern southwest stone strata surface terrace tion unconformity uplift Upper Freeport valley Vanport West Virginia western Yakutat bay


