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  1. Mark Kmiecik

    C0083 ?Asterophyllites equisetiformis

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 45mm X 13mm (1-3/4" x 1/2"). CONCAVE HALF BROKEN ACROSS SPECIMEN - GLUED.
  2. Mark Kmiecik

    C0077 Alethopteris serlii

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY FREEZE/THAW METHOD & LIGHT HAMMER TAP. SPECIMEN 60mm X 40mm (2-3/8" x 1-5/8").
  3. Mark Kmiecik

    C0073 Cyperites bicarinatus

    From the album: Mark's Mazon Creek Fossils

    CONCAVE HALF OF SIDERITE CONCRETION, FOUND AS-IS. SPECIMEN 100mm X 35mm (3-15/16" x 1-3/8").
  4. Mark Kmiecik

    C0058 ?Crenulopteris acadica

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY FREEZE-THAW & LIGHT HAMMER BLOW. MULTIPLE PINNAE. SPECIMEN 100mm X 50mm (3-15/16" x 2").
  5. Mark Kmiecik

    C0057 Macroneuropteris macrophylla

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY FREEZE-THAW & LIGHT HAMMER TAPS. SPECIMEN 95mm X 30mm (3-3/4" x 1-3/16"). YELLOW DEXTRIN APPLIED TO SPECIMEN.
  6. Mark Kmiecik

    C0056 Orthacanthus sp.

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. TWO TEETH - SPECIMENS 12mm X 8mm (1/2" x 5/16") AND 8mm X 5mm (5/16" x 3/16") . MOST OF EACH TOOTH IS BURIED IN THE MATRIX. BROKEN PIECE OF MATRIX GLUED BACK INTO POSITION PARTIALLY COVERING ONE OF THE TEETH.
  7. Mark Kmiecik

    C0055 ?Neuropteris sp.

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY FREEZE-THAW & LIGHT HAMMER BLOW. SPECIMEN 38mm X 15mm (1-1/2" x 5/8").
  8. Mark Kmiecik

    C0052 Coprolite

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 25mm X 10mm (1" x 3/8"). "FISH" SHAPED.
  9. Mark Kmiecik

    C0051 Radicites columnaris?

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 35mm X 35mm (1-3/8" x 1-3/8").
  10. Mark Kmiecik

    C0050 Lepidostrobophyllum lanceolatus

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 28mm X 8mm (1-1/8" x 5/16").
  11. Mark Kmiecik

    C0047 ?Calamostachys sp.

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN, INCLUDING SIDE BRANCH, 30mm X 12mm (1-3/16" x 1/2").
  12. Mark Kmiecik

    C0041 Macroneuropteris scheuchzeri

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 64mm X 18mm (2-1/2" X 11/16"). CONCAVE HALF BROKEN ACROSS SPECIMEN - GLUED. ACETIC ACID BATH APPLIED.
  13. Mark Kmiecik

    C0036 ?Crenulopteris acadica

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, FOUND AS IS. SPECIMEN 82mm X 33mm (3-3/16" x 1-5/16"), TAPERING TO 30mm (1-3/16").
  14. Mark Kmiecik

    C0035 Calamites cistii

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 123mm X 9mm (4-7/8" x 3/8"), AVERAGE. INTERNODAL LENGTH 76mm (3"). SMALL PORTION NEAR TIP OF CONVEX HALF GLUED. YELLOW DEXTRIN APPLIED TO SPECIMEN.
  15. From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 20mm X 17mm (13/16" x 11/16"). CONVEX HALF BROKEN NEAR, BUT NOT INTO SPECIMEN - GLUED.
  16. Mark Kmiecik

    C0030 Annularia inflata

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 55mm X 35mm (2-1/8" x 1-3/8"). TWO INCOMPLETE WHORLS.
  17. Mark Kmiecik

    C0024 Lepidostrobophyllum ovatifolius

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 18mm X 6mm (11/16" x 1/4").
  18. Mark Kmiecik

    C0023 Cyperites bicarinatus

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 110mm X 6mm (4-5/16" x 1/4"). BOTH HALVES FRAGMENTED & GLUED.
  19. Mark Kmiecik

    C0022 Macroneuropteris scheuchzeri

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 80mm X 32mm (3-1/8" x 1-1/4"). CONVEX HALF PARTIALLY DISINTEGRATED DUE TO UNDERLYING LAYER OF PYRITE. SALVAGEABLE PIECES GLUED BACK INTO POSITION.
  20. Mark Kmiecik

    C0021 Macroneuropteris scheuchzeri

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 75mm X 22mm (2-15/16" x 7/8").
  21. Mark Kmiecik

    C0020 Alethopteris serlii

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN, 85mm X 55mm (3-3/8" x 2-3/16"). YELLOW DEXTRIN APPLIED TO SPECIMEN.
  22. Mark Kmiecik

    C0019 Cyperites bicarinatus

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 72mm X 6mm (2-7/8" x 1/4"). FRAGMENT OF CONVEX HALF GLUED INTO POSITION.
  23. Mark Kmiecik

    C0018 Annularia inflata

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 75mm x 50mm (2-15/16" x 1-15/16"). PAINTED WITH YELLOW DEXTRIN TO INCREASE CONTRAST.
  24. Mark Kmiecik

    C0017 Cyclopteris orbicularis

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 60mm X 50mm (2-3/8" x 2"). BADLY WEATHERED. YELLOW DEXTRIN APPLIED TO SPECIMEN.
  25. Mark Kmiecik

    C0013 ?Diaphorodendron rimosum

    From the album: Mark's Mazon Creek Fossils

    BOTH HALVES SIDERITE CONCRETION, FOUND AS IS. CONCAVE HALF SEVERELY WEATHERED. SPECIMEN 30mm X 20mm (1-3/16" X 13/16").
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