United States Geological Survey YearbookThe Survey, 1987 - Geology |
From inside the book
Results 1-5 of 31
Page i
... Sedimentary Rocks Tertiary - Cretaceous Intrusive and Volcanic Rocks Undifferentiated Cretaceous - Jurassic Sedimentary Rocks Cretaceous Augen Gneiss Permian - Devonian Sedimentary Rocks Cambrian Sedimentary Rocks Cambrian - Proterozoic ...
... Sedimentary Rocks Tertiary - Cretaceous Intrusive and Volcanic Rocks Undifferentiated Cretaceous - Jurassic Sedimentary Rocks Cretaceous Augen Gneiss Permian - Devonian Sedimentary Rocks Cambrian Sedimentary Rocks Cambrian - Proterozoic ...
Page 2
... Sedimentary Strata MIDDLE PROTEROZOIC ( 1600-900 m.y. ago ) Grenville Province Keweenawan rocks EARLY PROTEROZOIC ( 2500-1600 m.y. ago ) Southern Province ARCHEAN ( before 2500 m.y. ago ) Superior Province Reflection Line Refraction ...
... Sedimentary Strata MIDDLE PROTEROZOIC ( 1600-900 m.y. ago ) Grenville Province Keweenawan rocks EARLY PROTEROZOIC ( 2500-1600 m.y. ago ) Southern Province ARCHEAN ( before 2500 m.y. ago ) Superior Province Reflection Line Refraction ...
Page 5
... sedimentary rocks . Study of these units on land indi- cates they were deposited in a feature known as the Mid - Continent Rift , a major continental - scale structure that curves in a broad arc from Kansas through Lake Supe- rior and ...
... sedimentary rocks . Study of these units on land indi- cates they were deposited in a feature known as the Mid - Continent Rift , a major continental - scale structure that curves in a broad arc from Kansas through Lake Supe- rior and ...
Page 6
... Sedimentary rocks Sedimentary rocks and interlayered basalt flows Basalt flows and interlayered sedimentary rocks Crust of Archean Superior province Granitic and metavolcanic rock near surface Bend in line 369 12 KILOMETERS ...
... Sedimentary rocks Sedimentary rocks and interlayered basalt flows Basalt flows and interlayered sedimentary rocks Crust of Archean Superior province Granitic and metavolcanic rock near surface Bend in line 369 12 KILOMETERS ...
Page 7
... sedimentary rocks of the Huronian Super- group , more than 2.2 b.y. old , are exposed in a fold belt known as the ... sedimentary rocks Sedimentary rocks with some interlayered basalt flows Basalt flows and interflow sedimentary rocks ...
... sedimentary rocks of the Huronian Super- group , more than 2.2 b.y. old , are exposed in a fold belt known as the ... sedimentary rocks Sedimentary rocks with some interlayered basalt flows Basalt flows and interflow sedimentary rocks ...
Other editions - View all
Common terms and phrases
activities Administration agencies Alaska aquifer basin Bureau Calcasieu River cartographic CD ROM Chief City City of w coal color Commission concentrations Connecticut contamination cooperative Coordination County crater data base Department of Public deposits drilling Earth Science earthquakes energy Enewetak Environmental facilities Federal feet Figure fiscal year 1987 geographic information systems geologic map Geologist geophysical gram graphic ground water hazards hydrologic Hydrologist investigations Lake Nyos land located lower Calcasieu River major Management ment miles million mineral resources mining models National Center National Mapping Division Office organic compounds Park percent Planning processes production projects Province quadrangle Regional Reston rocks samples San Andreas fault San Joaquin River scientific scientists sedimentary sediments seismic selenium Service South Stop studies surface Survey's techniques tion topographic Transportation U.S. Geological Survey United users USGS Vernalis Volcano Water District Water Resources water-use zone