Photos from Petrology Field Trip,

Photos from Petrology Field Trip, Spring 1998

Left: At Stop 1, Tracy, Brian, and Wes examine the disconformable contact between the Everton and Boone Formations. Melody comes to see. Right: Crinoids in the basal member of the Boone, the St. Joe Limestone (this is what they are looking at).

Left: At Stop 2, class examines the chert-free St. Joe Member of the Boone, but Wes is a little too interested in the contact with the overlying chert-bearing member. Right: Brian performs CPR incorrectly on the unfortunate Wes, but Wes recovers anyway. (No he didn't really fall; but climb outcrops at your own risk!)

Cross-bedding in the Pitkin Formation oolite. State Route 7, south of Jasper.

Jackfork formation near Y-city. Wes hasn't learned his lesson.

Left: Melody arises early, eager to see more rocks at Beaver's Bend State Park, OK. Right: Tech students relax on Stanley Fm sandstone ledges by cool stream after finding awsome outcrops of Mississippian-age tuffs.

Left: Carbonatite at Cove Creek, Magnet Cove, AR. Right: We stopped by the abandoned Baroid barite mine. This was an open pit and now is a deep deep lake. We won't tell you where we later found barite.

Left: ATU students look at lamprophyre dike (darker color, nearly vertical, left of student closest to outcrop) intruding here almost concordantly into the hornfelsed Stanley Fm. The offset in the dike is only an apparent offset due to the breaks in the quarry face. Right: Brian looks for veinlets near another dike that cuts the right limb of an inclined synform.

Rock hammer rests on xenolith in nepheline-bearing syenite near Bauxite, AR. The layered xenolith is surrounded by homogeneous nepheline-bearing syenite.

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