Browse Items (3 total)

Hand Specimen This white rock is virtually pure carbonate. It fizzes with acid. It is fine-grained and poorly cemented, making it soft and low density. It is commonly known as ‘chalk’. Thin-section Very uniform cryptocrystalline carbonate. Rare…

Hand Specimen Pale yellow-grey mudstone containing the fossil remains of a small arthropod with a segmented exoskeleton. The rock is banded and shows some surface discolouration due to weathering.Rock fizzes with acid, so contains carbonate. This…

Hand Specimen Very dark grey to black mudstone. Faint, fine-scale laminations visible on cut surface. Not fissile - does not readily split along bedding planes.Contains fossils and fossil imprints. Some glinting flakes of mica. This rock fizzes…