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GEOLOGIC AGE


Geologic Age:   	Identification Information
Originator:  United States Geological Survey (USGS)
		Date:  June 29, 1999
		Title:  South America Geologic Map (geo6_b and geo6_b.shp)
		Purpose:  The purpose of digitizing the geologic map was to allow us to have a geologic 
base on which we drew the boundaries of the geologic provinces of South America.
Abstract:  South America is part of Region 6 (Central and South America) for the World 
Energy Assessment.  The geologic map of South America was digitized so that we could use the geology as a general guide  to draw the boundaries of the geologic provinces of South America.


		Access Constraints:  none
		Use Constraints:  Portions of this database covering coastline and country boundaries 
contain intellectual property of Environmental Systems Research Institute, Inc.(ESRI), and are used with their permission. End users are permitted to use these data sets for their own internal use, including derivative work, but are prohibited from using and redistributing these data individually or in a derivative work to third parties.
		Ordering Instructions:  none

      		Contact Address:  U.S. Geological Survey MS939, Box 25046
        		City:  Denver
       		State or Province:  Colorado 
        		Postal Code:  80225-0046
       	 	Country: USA

Online Linkage:  http://energy.cr.usgs.gov/energy/WorldEnergy/WEnergy.html

		Entity and Attribute Information (table heading explanations)
		Shape:  ArcView file type
		Area (m^2):  Area of polygon
		Perimeter (m):  Perimeter of polygon
		Geo6_g_:  Internal feature number
		Geo6_g_id:  Feature identification number
		Glg:  abbreviated geologic age various geologic rock units of the geologic map:
Q, T, K, JK, J, TrJ, Tr, PZMZ, P,  CP, C, D, S, OS, CmO, Cm, AD, PZ, APZ, Qv, Cv, Mv, Pv, PZv, MCi, PMi, Mm, PZm, pC, H2O, Ice,  U
		Description:  Explanation of  "Glg" code:
			Q - Quaternary (undivided)
            			T - Tertiary
            			K - Cretaceous (undivided)
           			JK - Cretaceous and Jurassic
            			J - Jurassic (undivided)
            			TrJ - Jurassic and Triassic
            			Tr - Triassic
            			PZMZ - Paleozoic-Mesozoic
            			P - Permian
            			CP - Permian - Carboniferous
            			C - Carboniferous
            			D - Devonian (undivided)
            			S - Silurian
            			OS - Silurian - Ordovician
            			CmO - Ordovician - Cambrian
            			Cm - Cambrian
            			AD - Precambrian - Devonian
            			PZ - Paleozoic
            			APZ - Precambrian - Paleozoic
            			Qv - Quaternary volcanics
            			Cv - Creteceous - Tertiary volcanics
            			Mv - Mesozoic volcanics
            			Pv - Permian volcanics
            			PZv - Paleozoic volcanics
            			MCi - Mesozoic - Cenozoic intrusives
            			PMi - Paleozoic - Mesozoic intrusives
            			Mm - Mesozoic metamorphics
            			PZm - Paleozoic metamorphics
            			pC - Precambrian (undivided)
            			Ice - Arctic areas covered by Ice
            			H2O - Lakes and wide rivers
            			U - Unmappedd area
            			"" - "unlabeled"