GRD00VTS0
S-184
Replacement Features
Paleozoic › Cambrian
488.0
-
542.0
2
Ritter 154 › Cabinet 18 › Drawer O
Siliceous,ooids
Siliceous oolite, Gatesburg Fm., Cambrian.
The two thin sections look different from one another. I think that Slide 1 (the slide with the white paint on it) is cut from the sample we have, whereas the other slide might be from a similar looking sample or formation, but it is not cut from this sample.
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Pennsylvania
State College
Latitude: 40.7915°
Longitude: -77.8594°
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Slide 1: Silicified ooids, some with quartz in the cores
2.5
plane
Slide 1: Silicified ooids, some with quartz in the cores
2.5
crossed
Large ooids with crystalline cores
2.5
plane
Large ooids with crystalline cores
2.5
crossed
Slide 1
scan
crossed
Slide 1
scan
plane
Slide 2
scan
crossed
Slide 2
scan
plane
GRD00VTT0: Slide 1: Silicified oolite. 30% of the ooids have rounded metamorphic quartz in the cores. Ooids are replaced with silica. Matrix is crystalline quartz. White paint with label on the corner of the slide. (C. Eichler)
GRD00VTT1: Slide 2: Different than slide 1. These silcified ooids are larger, not as coarsely crystalline, and contain fewer quartz crystals. Many of the cores are coarsely crystalline quartz. Silicified oolite. (C. Eichler)
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