Information Texas Coastal Geology

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opening and closing an ocean opening the Texas margin we start with Cambrian with distributed rifting blocks and ribbons we'll show a map of that just a second we go into the Ordovician there's probably a mid or division kind of event that's all off off board essentially offshore and mostly not so much preserved but it has some stratigraphic effects that are preserved on the Texas margin then after a while of laurentia floating around in the world ocean we start to have the closing of the oceans on the southern and eastern margins of laurentia that ultimately gives you the the Washita origin in the pennsylvania and the arrival of the Yucatan block as part of that and in this whole sort of Washington mode along with these ancestral Rockies we'll get to that aside then in the Triassic mid Jurassic we have a phase one of continental extension that is taking continental crust and just stretching the heck out of it to give you what would be called a hyper-extended crust crust that's partly