Day at the Geology Department – Cardiff Museum

All objects photographed are courtesy of the Nation Museum Cardiff.

Other info I learnt:

XRD scan – tells you what minerals are in a rock.

They still use the Old County system in the Geology archive.

Ripple structures and sun cracks that I was shown were over 2 million years old.

Go to Lavenock – could find some rocks with holes there.

Look up Glaglomerates, brachiopods, bivalves, pholas (mollusc), Cliona (sponge), grapholites

Volcanic ash deposits – built in layers.  layers in volcanic as well as sedimentary rock. they collect contemporary material. eg ash from the recent ash cloud. Volcanic oddities – volcanic bomb, spindle bombs for tourists. lava medallions and coins in lava sold as souvenirs.

Cave pearls grow in pools within caves. They are built in layers like a pearl or an oyster. Grown around dirt and deposits.

Coal collection – irreplaceable – the mines have now closed/flooded so no coal like this can be retrieved now.

At Southerndown there is Carveniverous rocks and Triassic rocks in layers. There is a huge gap in time between the layers. This is called an un-conformity.

Brachiopods – look into these creatures and the differences between them and bivalves.

South Wales Geological Association – downloads for walks

Penarth – silocerous – contain the earliest ammonite.

Ammonites come in many different shapes caused by water type, tides, climate etc


  • Tell the story of the bivalve mollusc in the rock.
  • Make the paintings more accurate? Paint directly from viewing these rocks.
  • Projecting onto rocks

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