Browse Items (5 total)

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 Mainly medium sand (to coarse sand in the case of L327a). Yellow-brown iron stained quartz, cemented by the same yellow brown oxide. A few larger quartz grains up to 5 mm long. Grains are angular to sub-rounded, and poorly…

Hand Specimen Pale grey rock, mainly medium to coarse grained quartz sand. Poorly sorted. Small amounts of lithic fragments up to 10 mm across, and shell fragments. Contains <15 vol% clay, making it an arenite.Pale grey cement fizzes…

Hand Specimen Reddish brown rock made up of pinkish feldspar, colourless quartz, and some dark grey grains. Medium to coarse sand. Moderately rounded. Fairly well sorted. Contains <15 vol% clay, so this is an arenite. No fizzing with…

Hand Specimen Pale yellow grey rock, almost entirely made up of medium sand quartz grains. These are sub-rounded, very well sorted, and are held together by a matrix of siliceous silt. Contains a significant amount of clay, but <15 vol%,…