Prasopora sp. (Nicholson&Etheridge 1887)
4.5cm. Topside. From the JD quarry at Gamebridge,On., Canada. Upper Ordovician, Katian, Verulam Formation.
Photo Information
- Taken with Panasonic DMC-FS3
- Focal Length 5.5 mm
- Exposure Time 10/200
- f Aperture f/2.8
- ISO Speed 400
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