Siltstone Member o-x Kingscourt (Triassic of Ireland)

Where: Ireland (53.9° N, 6.8° W: paleocoordinates 16.0° N, 10.0° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Siltstone Member (Kingscourt Sandstone Formation), Griesbachian (252.2 - 251.3 Ma)

• Thickness 80-100m. Strata of this member come to surface in a river-section near Cormey Bridge, north-east of Kingscourt, and are also well-exposed in a nearby brick-pit worked by the Kingscourt Bricks and Shale Company.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; green siltstone and gray sandstone

• The succession eventually consists of alternating siltstones and subordinate fine sandstone, often showing small-scale exposure cross-lamination. "Mud-flake" breccias are locally developed, as are dessiction cracks. Red colours predominate but pale green bands and apots frequently occur. Within the member the sand content becomes more predominant towards the top. an exception, however, is a relatively thin sequence (0.5-1m) of parallel bedded greyisch sandstones, that occurs intercalated with the red siltstone facies either at or within a few meters of the base of the member. A bulk sample consisting of greenisch and greyisch material taken from several levels throughout the brick pit has yielded a small amount of recognizable pollen and spores.

Size class: microfossils

Preservation: original sporopollenin

Collection methods: bulk, chemical, mechanical,

Primary reference: H. Visscher. 1971. The Permian and Triassic of the Kingscourt Outlier, Ireland. Geological Survey of Ireland Special Paper 1:1-114 [C. Looy/C. Looy/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 26379: authorized by Cindy Looy, entered by Cindy Looy on 15.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• P Present-percentage not known) 1-5% Rare 6-15% Frequent 16-25% Common >25 % Abundant
Striatiti spp.
P multi-taeniate pollen grains mostly Striatisaccus
? Cycadopites sp. Wodehouse 1933
 Gymnospermophyta -
Vitreisporites pallidus Nilsson 1958
? Lundbladispora spp. Balme 1963