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This is a museum quality collection of rare and unusual thin red shale slabs excavated from an ancient riverbed formation in New Jersey. The shale contains impressions of plants and animals living in the early Triassic geological timeframe (approx. 197 million years old). The impressions contain molds and casts. Some of the impressions are multi-layered sets. Identified footprints are:
This is a simplified model to explain the formation and preservation of
dinosaur tracks: (a) a dinosaur's foot impressed in the substrate;
(b) the foot is withdrawn, leaving its imprint; (c) the footprint is filled
and buried by accumulating sediment; (d) after lithification, the sediments are
split open to reveal the original footprint and its filling; (e) the original imprint or natural
mould; (f) the footprint filling or natural cast, shown inverted.
Reprint from DINOSAUR TRACKS by Mr. Tony Thulborn, Chapman and Hall, 1990
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This collection is museum quality material. Quotes for the above samples
and others from the collection are provided upon request.
Serious inquiries only.
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people have visited this page since 14 August 1997.