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A
Rainy Day
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Trace
Maker
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Amphibian |
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Trace
Name
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Pseudobradypus
sp.
SUE-DOE-BRAD-EE-PUS |
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Age
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Carboniferous
Period
(About 315 million years old) |
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Where
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Joggins,
Nova Scotia |
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Cast
or Mold
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Cast |
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Collector
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Don
Reid, President, Joggins Fossil Centre |
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These
foot prints and body drag were made by an amphibian as it walked
over a beach on a rainy day long ago. How do we know this? Can
you see all the round dots? These are imprints made by rain
drops as they hit wet sand. The rain drops made indents and
then were later filled in by more sand, creating a cast -- that's
why they now appear as raised dots.
The large rounded bumps also give us information about the ancient
environment in which the amphibian lived. These are ripple marks
and they form when water flows over sand or silt. The creature
was walking along a shore line in the rain. |
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