Tag Archives: Texas

Two West Texas outcrops: which looks more inviting?

Mark Wilson November 15, 2009 11:27 am

COLLEGE STATION, TEXAS–The upper one is the base of the Valera Formation on US Highway 84 (N31.88196°, W99.47115°) and the lower one is the lower Bead Mountain Formation on Route 6 near Albany; both are Permian and both have delicious … Continue reading →

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The puzzle of gypsum

Mark Wilson November 15, 2009 11:25 am

Our Permian sections on this Texas trip have had thick beds of gypsum only a meter or three beneath our fossiliferous limestones and shales. Gypsum (calcium sulfate) is an evaporite mineral, indicating when the Permian shallow sea in this case … Continue reading →

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You’re never alone on an outcrop

Mark Wilson November 13, 2009 10:28 pm
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A West Texas outcrop

Mark Wilson November 13, 2009 10:18 pm

BROWNWOOD, TEXAS–It was nearly a five hour drive from College Station, Texas, through the Hill Country to our first Permian exposure in West Texas. (We passed, by the way, through Killeen and Fort Hood.) It was worth the trip for … Continue reading →

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Wooster Geologist in Texas

Mark Wilson November 12, 2009 9:46 pm

COLLEGE STATION, TEXAS–I arrived this afternoon in beautiful central Texas to give a talk at Texas A&M University on bioerosion.  If you click the link you can see my PowerPoint slides.  The talk went well enough and there were many … Continue reading →

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