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regional geology

Biogenic sedimentary structures (trace fossils)

For each photograph:

to which of the behavioural groups does the trace belong?
what information does each sample reveal about oxygenation, sedimentation rate, currents, other sedimentary conditions and processes?
try to think what type of organism might have created the trace;
record your observations as notes and diagrams.

These photographs form part of a laboratory exercise at the University of Derby

Photo 3.1. Looking down onto a bedding surface in limestone. Pen is 15cm long

Photo 3.2. Structures seen in cross section. Hammer head is 15 cm long.

Close-up of part of photo 3.2

Photo 3.3. Trace fossils seen in cross section through a limestone bed. Lens cap is 50mm in diameter.

Photo 3.4. Looking down onto a bedding surface in silty mudstones. Coin is 3 cm in diameter

Close-up of part of photo 3.4

Photo 3.5. Looking down onto a bedding surface in limestones. Photograph is about 100 cm wide.

Photo 3.6. Pen is 15 cm long.

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