A Pair of Trigonias from the Severn Formation, MD.
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By Jeffrey P
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Gabbigonia (Trigonia) eufalensis Trigoniidae Bivalve 3/4 inch wide Upper Cretaceous Severn Formation Monmouth Group Prince George's CO., MD. A gift from HistorianMichael
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Photo Information
- Taken with Apple iPad mini
- Focal Length 3 mm
- Exposure Time 1/60
- f Aperture f/1.8
- ISO Speed 125
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