1995-03-22_GENERAL DOCUMENTS - M1977451 (4)

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TABLE 9•Averne mineral composition, in percent, of sandstones TABLE 10.—Aver a mineral composition, in percent, from as Brushy Basin Member of the Morrison Formation ag P , P cy B of cMembe- erale and conglomeratic sandstones from the Brushy Bann Member (Bssed on model ppooint counts (200 points) and modal estlmstes of thin s10110 � of the Morrison Formation ••Vge'generally Indicates lees than O.ia peroent) points) (Based on modal�Minoint rRnatsmelly Indicates less than 25I�ntl f thin ssettsm. tares Middle ironer ComponmC ben to o�nit unlbrotn Member (Mlddb peen grim Upper n Component and coupes grim brosu Quartz and overg----- ---------------- 74 80 48.5 bm bind) Dots owe Cheri______________ 8 7 14 combined) Orthoclase_______________________ 2 8 7 Microcline_______________________ 1 .5 Minor Quartz and quarts overgrowths_-_ 54 50 58 5 Plagioclase_______________________ 2 1.5 8 Chert------------------------- 14 13 15 Rock fragments and mineral Orthoclase_-__--.______________ 1 .5 1. 5 i aggregates_____________________ 1 1 5 Plagioclase--------------------- 4.5 7. 5 1 Clay (mineral clay and clay-sized Rock fragments and mineral ag. detritua)----------------------- 2.5 14 6.5 gre ates____-___-_-________._ 19. 5 21.5 17 Calcite and dolomite______________ 11 9 13 Clay(mineral clay and clay-eized Barite___________________________ Minor Minor Minor detritus)--------------------- 5 5 5 Chlorite_________________________ Minor I I Calcite and dolomite------------ 1 2 Minor Hematite and other black opaque Barite_________________________ Minor -------- Minor minerals_______________________ Minor Minor Minor Chlorite----------------------- .5 -------- 1 Biotite__________________________ Minor Minor Minor Hematite and other black opaque Muscovite_______________________ Minor Minor -------- minerals--------------------- .25 .5 Minor Leucoxene and anstase------------ Minor Minor Minor Muscovite_____________________ Minor -------- Minor Pyrite and marraeite--------------_------- Minor -------- Leucoxene and anatase---------- Minor Minor Minor Number of samples_______________ 7 3 3 Number of samples------------- 4 2 2 i TABLE 12.Average mineral composition, in�� ppercent, of mudsfones from the Brushy Basin Member of Ne Montiaon Formation 11.Aoerape mineral composition, in percent, of eiltslorb!from the Brushy Basin Member of the Morrison Formation [Based d model'gn poInt counts (200 points) and modal estimates of thin sections. one,generally Indicates less than 0.23 paremt) IBssad on model estimates of thin aectiom.^Wane-gaawalty laddot ad less than 0.23 perentl Muddle Upper Component gem unit brawn unit Middle Upper Component green unit brown nun arts_______________ - 28 28. 5 hart------------------------------------'------ .5 Quarts and quartz overgrowths_____________ 50 84 Orthoclase------------------------------- 2 3 hert-------------------------------------------- 8.5 MicrocUme------------------------------- Minor -------- Orthoclase------------------------------- 4 3 Plagioclase- 2 5 Microcline_______________________________ 1 1 Rock fragments and mineral agregates.............__ Minor Plagioclase_______________________________ 4 2 Clay (mineral clay and clay-sized detritus)--- 80 52 Clay (mineral clay and clay-sized detritus)-__ 15 1& 5 Calcite__________________________________ 4 2.5 Calcite and dolomite---------------------- 25 1.5 Barite----------------.------------------ 2 Minot Barite------------------------------------------- Minor Chlorite---------- 5 Chlorite__________________________________ Minor Minor Hematite and other black opaque minerals_-- Minor . 5 Hematite and other black opaque minerals-___ 1 . 5 Biotite__________________________________ Minor .5 Biotite___________________________________ Minor Minor . Muscovite (green mica in upper brown unit)_ Minor 1 Muscovite________________________________ Minor Minor Leucoxene and anataae-------------------- Minor Minor Leucozene and aaateee-------------------- Minor Minor 'Limomite-------------------------------- Minor -------- I ---------------------------------- Minor Minor Number of samples_______________________ 1 3 �Analcite--------------------------------- 1.5 -------- tCarbonaceous material____________________ Minor 1 �umberofmmplee----------------------- 7 8 Mineral Composition of Brushy Basin rocks in the Slick Rock District (from Shawe, 1968) .