OCR Text |
Show COAL FIELDS AND OIL SHALE DEPOSITS Map No. 7 ,.. 1i ^ r*. i » , 111.1 / 1 I. I. Ij. i.'.' j <: i: i; rxi:-- EXPLANATION Deeply buried Cretaceous strata, probably coal bearing, orshallow where information is meager. Cretaceous outcrops of coal. Coal zones or important seams Tertiary coal bearing rock, lignite or sub- bituminous Carboniferous coal bearing rock Area underlain by oil shale of all grades. Area of thick, rich oil shale & Cretaceous strata, probably coal bearing, Oil shale area suitable forstripping or open cut mining. Prototype area for exploitation of oil shale by in situ methods. 10 Scale in Miles 10 = 1 Vert. Shaft Prototype area for exploitation of oil shale by mining, From Coal Fields of Utah & File No. 1366 A, I376A & I377C, Utah Geological Survey. |