Fossils Found in the Brush Creek Marine Zone, at Ambridge, PA

Fossils here include:

(The smallest divisions in the ruler are 1/8")

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Gastropods

Shansiella sp. Gastropod

These gastropods are fairly common. On well preserved ones, as in the one to the right, you can see the growth lines. Formation: Brush Creek Marine Zone Age: Middle-Pennsylvanian ~300 m.y. Location: Ambridge, Beaver Co., PA Size: usually from 3/4 - 1 1/2" (19-38mm)

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Straight Shelled Nautaloids

??sp.

Straight Shelled Nautoloids are common in the oily shale. However, they tend to be broken along their numerouse small chambers, and are difficuly to recover complete. Also, larger ones can be occasionally found. Formation: Brush Creek Marine Zone Age: Middle-Pennsylvanian ~300 m.y. Location: Ambridge, Beaver Co., PA Size: Usally complete ones are a little over 2" (51 mm)

??sp.

This is a larger nautoloid that was smooshed before preservation. Occasionally, larger ones can be found, however, they are usually in poor condition, as the one in the picture is. Formation: Brush Creek Marine Zone Age: Middle-Pennsylvanian ~300 m.y. Location: Ambridge, Beaver Co., PA Size: " (mm)

Coral

Stereostylus sp. Horn Coral

Horn coral is abundant in this marine zone. They are typically the size of the ones pictured here. Formation: Brush Creek Marine Zone Age: Middle-Pennsylvanian ~300 m.y. Location: Ambridge, Beaver Co., PA Size: ~3/4 - 1" (19 - 25mm)

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