2010-04-20_GENERAL DOCUMENTS - M2009076 (2)

Home Browse Search

4TES DEPARTMENT OF THE INTERIOR. GEOLOGICAL SURVEY 105 °33'45" 39 °46'15„ !�� g /, %� 39'45'-7' — Q cl Alluvium Colluvium o z >< r Cr L � Porphyritic intrusive rocks ._, 0 --"0o �1 I Biotite - ;.muscovite granite } } } 5274 } + + + Z ` Q Granodiorite and quartz diorite 105 ° 33'45" )gical Survey 105`32'30" 105 °31'15" 105 °30' 7000' 7000' 105° 31'15" 1/-39 °46'15° EXPLANATION Q Alluvium Colluvium o z >< r Cr L � Porphyritic intrusive rocks W 0 --"0o �1 I Biotite - ;.muscovite granite } } } } + + + Z ` Q Granodiorite and quartz diorite [I] � � Biotite gneiss and granite gneiss U W Includes some pegmatite, amphibo- a_' lite, talc- silicate gneiss, and quartz gneiss a c� Microcline gneiss Includes some a.mphibolite GENERALIZED (GEOLOGIC MAP AND SECTIONS OF THE IDAHO SPRINGS DISTRICT, COLORADO 2000 0 2000 4000 6000 8000 10,000 FEET CONTOUR INTERVAL 500 FEET DATUM IS MEAN SEA LEVEL BULLETIN 1c, PLATE 2 C. Fault, showing dip Anticline Showing trace of axial plane I Syncline Showing trace of axial plane Overturned anticline Showing trace of axial plane and direction of dip of limbs -- 0 Overturned syncline Showing trace or axial plane and direction of dip of limbs 35 Strike and dip of foliation 43�OG /0 Strike and dip of foliation and plunge of lineations 56 Strike and dip of foliation and horizontal lineation _1�y1.A�y yi.Ly Approximate northwest limit of zone of intense younger Precam- brian deformation 10,000' 9000' 8000' 7000' Geology by R. H. Moench, A. A. Drab and others, 1953 -54 783 -337 O - 65 (In pocket;