Field Notebook: Texas 1959
Page 19
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Transcription
grained lutites, and a few 6" limestone are rare (2 or 3) between second limestone Word and third limestone. Cooper pointed out a high Leonard limestone locality just north of the road up Gilliland Canyon at the base of the Word fm. PG. 27 It seems that Cooper's "Hess Ledge" can be traced around the end of the ridge behind the Hess ranch House and behind the horst to a point opposite the gap between the hills in the horst. He doesn't find this fauna on the front of the limestone escapement to the south (Hess escapement) because in his words "it isn't the right lithology". Thus he would rule out the idea that his fauna occurs in several horizons. Wilde is using the first Leonard limestone of King (1930) as equal to the Hess fossil bed. - This seems to solve a few problems - but I wonder how many? The section we measured in the Word seems to best fit in with King's 1930 Sect. 18, p. 71, but this on depositional strike 2.5 miles +- to the NE. PG. 28 7/15/59 [Old Word Ranch] Split Tank Collection 3-(19) from upper dolomitic limestone in Hess facies - most of this is a crinoid cochina - 15' below top. (maybe in lower limestone of Leonard). Collection 3-(2) Leonard -[3-13]. The upper beds of Leonard (2) have abundant fusulinids. Road to Red Tank Word first limestone - has limestone cobbles in the upper unit. Overlain by 15- 20' of siliceous shale followed by dolomitic #2 limestone. Collection from float near top of first limestone. Collection - 4 to 5' above Word limestone #2. PG. 29 The fourth Word limestone and the Vidrio are dolostone facies for most part here. They like the Upper 250' of Hess facies locally they have abundant relict outlines of fusulinids but we couldn't find any that were well preserved. The Split Tank Leonard section is faulted in several places and we were able to follow King's section in only a general way. Cooper said each limestone was a lense which pinches out within a short distance and each of these apparently contains a distinct brachiopod assemblage. PG. 30 7/16/59--Hess Ranch Loc. 2 Word limestone; second limestone by the road north of the horst - This is apparently second or third limestone - in the field I judged it to be the second limestone - or #1.