Llun: 1
Lecture: Morlais

Cliffs and granite slabs with moss and mossy saxifrage. Morlais Quarry, 1973
Enw rhywogaeth Mary: Mossy Saxifrage
Enw gwyddonol: Saxifraga hypnoides
Enw cyffredin: Mossy Saxifrage

Dyddiad: 1973

Llun: 2
Lecture: Morlais

Morlais quarry. Thunder squall breaks 1983 drought

Dyddiad: 1983

Llun: 3
Lecture: Morlais

Peat build-up on stone floor of Morlais Quarry, June 1973

Dyddiad: June 1973

Llun: 4
Lecture: Morlais

Development of limestone grassland on talus heaps, Morlais Quarry, 1973

Dyddiad: 1973