Fossils Found in the Mahoning Formation, at Ambridge, PA

Fossils here include:



Since there can be multiple fossils per plate, the plates are listed here, The fossils on the plates are listed below them.
Plate1
Pecopteris aborescens
Pecopteris sp.
Plate2
Pecopteris sp.
?
Plate3
calmites
Pecopteris sp.
Plate4
Under Construction
Plate5
Under Construction
seed fern trees, herbaceous ferns, horsetail trees (Calamites),

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

Plate 1

Identification based on ().
Most frond and stem fragments are pecopteris aborescens
The fragments are pecopteris sp.
If you are careful, and take your time, large slabs usually containing fragments of various Pecopteris sp. can be extracted.

This is a typical fern plate from this location. It consits entirely of pecopteris frond and stem fragments. Most of them are p. aborescens.

You may also see a seem in this image, it was to big to fit on the scanner, and is thus a composite of two images.

Formation:
  • Mahoning Formation
    Age:
  • Middle-Pennsylvanian ~300 m.y.
    Location:
  • Ambridge, Beaver Co., PA
    Size:
  • 14" across (350mm)


    • Plate 2

    Identification based on ().
    #1: pecopteris sp., #2: unidentified (still trying to I.D. it)
    fronds


    Formation:
  • Mahoning Formation
    Age:
  • Middle-Pennsylvanian ~300 m.y.
    Location:
  • Ambridge, Beaver Co., PA
    Size:
  • 14" across (350mm)

    • Plate 3

    Identification based on ().
    Calimites, Pecopteris sp.
    fronds
    This plate shows the posative and negative of a calimites stem piece and a pecopteres sp. leaf.
    The center one is the posative, the 2 side parts are the negatives

    Formation:
  • Mahoning Formation
    Age:
  • Middle-Pennsylvanian ~300 m.y.
    Location:
  • Ambridge, Beaver Co., PA
    Size:
  • 14" across (350mm)

    • Plate 4

    genus
    common name

    Formation:
  • Mahoning Formation
    Age:
  • Middle-Pennsylvanian ~300 m.y.
    Location:
  • Ambridge, Beaver Co., PA
    Size:
  • ~" (mm)

    • Plate 5

    genus
    common name

    Formation:
  • Mahoning Formation
    Age:
  • Middle-Pennsylvanian ~300 m.y.
    Location:
  • Ambridge, Beaver Co., PA
    Size:
  • ~2" (50mm)



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