Thin-section pics of Late Pennsylvanian Limestone from TX

[geolken1]

These are some of better pictures I got while researching a Late-Penn Limestone bank in North-Central TX. The first is a cross sectional view of a Biserial Foram which I cannot remember the name of...

The second contains numerous allochems, most noticeable is the Fusilinid Foram (Spiral) and the longer fragment is a species of Phylloid Algae. Two species of this algae were the main carbonate builders of this limestone bank. While growing, they accumulated and trapped fine mud and sediment. This effectively created a type of growth framework made of of carbonate mud and the skeletal remains of previous algae generations.

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[davemarshall]

Thanks for sharing! Is the first not some sort of Textularia? I'm not sure how far back they go.