NEVADA BUREAU OF MINES Vernon E. Scheid, Director BULLETIN 67 GEOLOGY OF THE ROWLAND QUADRANGLE, ELK0 COUNTY, NEVADA BY Kent Bushnell MACKAY SCHOOL OF MINES UNIVERSITY OF NEVADA Reno, Nevada 1967 CONTENTS PAGE Foreword .............................................................................................................. v Abstract ................................................................................................................ 1 Introduction ............................................................................................................. 1 Location and accessibility.............................................................................. 1 Previous work .............................................................................................. 1 Present work and acknowledgments.............................................................. 3 Geography............................................................................................................ 3 Physical features ............................................................................................ 3 Climate. vegetation. and culture .................................................................... Paleozoic stratigraphy........................................................................................... Regional setting............................................................................................ Local setting.................................................................................................. Stratigraphy 'of the southern part of the quadrangle ...................................... Sunflower Formation ............................................................................ Occurrence. and thickness .............................................................. Descnption ................................................................................... Basal conglomerate member .................... .. ........................ Limestone member ................................................................ Age ............................................................................................... 7 Tennessee Mountain Formation ............................................................ 8 Occurrence. and age ...................................................................... 8 Description .................................................................................... 8 Paleozoic(?) phyllite (Pzp)................................................................... 9 Prospect Mountain(?) Quartzite................ ....... ............................. 9 Occurrence .................................................................................... 9 . Description ................................................................................... 10 Age and correlation ................ .. ................................................ 10 Stratigraphy of the northern part of the quadrangle ...................................... 11 Diamond A Formation .......................................................................... 12 Occurrence. .................................................................................... 12 Description .................................................................................. 13 Age and correlation........... .. ....................................................... 14 Paleozoic argillite and phyllite (Pza) .................................................... 14 Pza ,................ ...... ................................................................. 14 Pza ,............................................................................................... 15 Pza ,.............................................................................................. 15 Paleozoic. schist. and limestone (Pzb) .................................................... 15 Paleozoic hmestone (Pzc) ................. .... ....................................... 16 Pzc, ............................................................................................... 16 Pzc ,.............................................................................................. 16 Paleozoic limestone and argillite (Pzd) ................................................ 16 Age and correlation of formations below the Diamond A Limestone.... 17 Intrusive rocks. ..................................................................................................... 18 Gramtic stocks.............................................................................................. 18 Coffeepot stock........... ...... .................................................................... Deep Creek stock.................................................................................. Contact metamorphism and metasomatism........................................... Associated. veins and dikes .................................................................... Ongn of the stocks............................................................................... Age of the granites ................................................................................ Dikes ............................................................................................................ Cenozoic rocks and geomorphology....... ... ................. ........................................... Middle Cenozoic........................................................................................... Bieroth Andesite................................................................................... Jarbidge Rhyolite................................................................................. STATE OF NEVADA PAULLAXALT, Governor UNIVERSITY OF NEVADA CHARLESJ. ARMSTRONG, President NEVADA BUREAU OF MINES NEVADA MI N l NG ANALYTICAL LABORATORY VERNONE. SCHEID,Director JOHNH. SCHILLING,Acfing Associafe Director For sole by Nevada Bureau of Mines, University of Nevada, Reno, Nevada, 89507. Price $2.50 CONTENTS PAGE Foreword ............................................................................................................... v Abstract ................................................................................................................ 1 Introduction .......................................................................................................... 1 ... Location and accesslb~llty.............................................................................. 1 Previous work ............................................................................................... 1 Present work and acknowledgments .............................................................. 3 Geography............................................................................................................ 3 Physical features ............................................................................................ 3 Climate, vegetation, and culture .................................................................... 4 Paleozoic stratigraphy ........................................................................................... 4 Regional setting............................................................................................ 4 Local setting.................................................................................................. 5 Stratigraphy of the southern part of the quadrangle ...................................... 5 Sunflower Formation ............................................................................ 5 Occurrence. and thickness .............................................................. 5 Descnptlon ................................................................................... 5 Basal conglomerate member .................................................. 5 Limestone member ................................................................ 6 Age ............................................................................................... 7 Tennessee Mountain Formation ............................................................ 8 Occurrence. and age ...................................................................... 8 Descnphon .................................................................................... 8 Paleozoic(?) phyllite (Pzp)................................................................... 9 Prospect Mountain(?) Quartzite .......................................................... 9 Occurrence.................................................................................... 9 . Descnphon .................................................................................... 10 Age and correlation .................................................................. 10 Stratigraphy of the northern part of the quadrangle ...................................... 11 . Dlamond A Formation .......................................................................... 12 Occurrence. ......... ....... ............................................................. 12 Descnpt~on................................................................................... 13 Age and correlation....................................................................... 14 Paleozoic argillite and phyllite (Pza) .................................................... 14 Pza ,................................................................................................ 14 Pza ,..............................................................................................