. First[-fourth] annual report of the Geological survey of Texas, 1889[-1892] Edwin T. Dumble, state geologist. rfectly worked as this there is an impropriety in attempt-ing to lay out geographic or geologic areas which may even approximatelyrepresent the lead bearing belts. Such allotment is particularly inapplicablehere on account of the broad extent of the rocks which may possibly becharged with the ore. The classification of localities adopted is therefore tobe taken only as one of convenience for present purposes. THE BURNET COUNTY TRACT. The exact conditions of the substructure in the le
. First[-fourth] annual report of the Geological survey of Texas, 1889[-1892] Edwin T. Dumble, state geologist. rfectly worked as this there is an impropriety in attempt-ing to lay out geographic or geologic areas which may even approximatelyrepresent the lead bearing belts. Such allotment is particularly inapplicablehere on account of the broad extent of the rocks which may possibly becharged with the ore. The classification of localities adopted is therefore tobe taken only as one of convenience for present purposes. THE BURNET COUNTY TRACT. The exact conditions of the substructure in the lead bearing area on Beaverand Silver Mine creeks, in Burnet County, can not be made out in sufficientdetail to serve as a working guide until more mining has been done, or atleast until more time can be given to the study of the problems involved inthe situation. The cut (Fig. 65) exhibits, however, a geologic plan and sectionwhich does not exaggerate the complexity, although it may not represent allthe details as they will eventually be worked out in the development of thetract. *Op. cit, p. 340. Lead. 585. Fig. 65. Plan and section illustrating the geologic structure in the Lead Region of Northwest Burnet County. The faults are certainly more numerous, following for the most part thecourses of the streams, which run in canyons evidently originated by thesestructural lines.* Without further remark it is sufficient to say that thetopography as indicated will give to an experienced person an idea of the po-sitions of the breaks. The points of greatest interest are the deeper seatedeffects of the later upheavals and the unknown section below the base of theCambrian. There is a possibility that a small portion of the unexposed granite herereferred to the Post-Silurian geanticline is really a portion of the much ear-lier Burnetian axes. A gneissic rock, much altered, which was encounteredin one of the workings at Mr. Gages camp, in Silver Mine Hollow, lendscolor to the supposition,
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