Bulletin, Issues 872-873U.S. Government Printing Office, 1936 - Geology |
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Common terms and phrases
Alaska Allegheny anticline argillite bank bedrock beds belt biotite Birch Creek Birch Creek schist Butler and Zelienople Butler County Calico Bluff formation Cambrian chert Clay Collector conglomerate Connoquenessing Connoquenessing Creek correlation Cretaceous rocks crop deposits Devonian erosion feldspar folding Fork Fortymile Fortymile River Fossil Creek gold placers granitic rocks gravel greenstone Hot Springs international boundary intrusive J. B. Mertie Kittanning L. M. Prindle lavas limestone lithology Livengood locality lodes Lower Cretaceous mapped Mesozoic miles minerals mining Minook Creek Mississippian mouth Nation River formation northeast occur Ordovician plagioclase pre-Cambrian present Productus quartz quartzite Rampart district Rampart group ridge sandstone sandy shale schist sediments sequence shale Silurian slate Slippery Rock Creek southeast southwest stratigraphic stream structure Survey Bull Tanana River Tertiary Tindir group Tolovana Township tributaries U. S. Geol valley Vanport White Mountains Woodchopper Yukon River Yukon-Tanana region Zelienople Zelienople quadrangle