Field Notebook: Texas 1959
Page 5
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Transcription
13) Sandstone, light brown silicified crinoid stems and brachiopods well sorted, fine grained - grade vertically into calcarenite. Collection 2-13A - 32'. 105' top of ridge to saddle - thickness of unit--158'. PG. 5 14) Dolostone - brown-gray, porous, sacchoidal, weathers to pitted surface - 3 to 6' beds - 10'. 15) Limestone, light gray, 6" to 2' beds - little in the way of shales or siltstone. 2-15A - 42' up 2-15B - 65' up Several different limestones in this unit - all are very fine sand size or lutites limestone. The more rubbly beds are white, sand size and are brown-gray. 4 or 5 alteration of grain size. - total for unit - - 205' 16) Limestone, orange-brown weathering, [relict outlines of fusulinids (abundant) 5' at base]. Like 15 below. Collection 2-16A - 53'. [at 65' a mottle quartz ss. bed with shell fragments] [ at 97' - silty bed 1', brown-orange, brachiopods]. Collection 2-16B -at 185'.--- total for unit --197'. PG. 6 17) Sandstone, orange-brown weathering very silty, calcareous cement - 3" to 1' beds. at 30' a shell hash - recrystallized, no fusulinids, but has crinoid columns. --------------42'. [base of Leonard Facies?] 18) Limestone, gray-brown weathering, 1' to 3' beds, pock marked, silt and fine calcarenite for most part. [22' recrystallized fusulinids abundant] [ 154' and 3' conglomerate bed, including quartz, quartzite, chalcedony pebbles to 1.5"" diameter].---157' [West?] Afternoon looked at the rest of the Leonard fm., lower part of Word fm. There isn't much difference between the Hess facies and these upper units this far east [west?]. King's Sect. about 2 miles east is supposed to be quite markedly different in the 2 facies of the Leonard fm, but can't say that is true here. PG. 7 {note: attached illustration of beds} [From the top of these hills one can see beds in the Leonard fm thicken and thin within short distances. The units of brown-gray dolomite limestone may change