Middle Sandstone Member y 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: Middle Sandstone Member (Kingscourt Sandstone Formation), Griesbachian (252.2 - 251.3 Ma)

• Thickness 2-30m. This impersistent member is only known from a few boreholes.

• bed-level stratigraphic resolution

Environment/lithology: marine; gray sandstone and shale

• It is characterized by parallel bedded grey-white fine sandstones, that die out to the west. Internal erosion planes and cross-laminae are present. In one core fragment composed of grey sandstone with some thin shaly intercalations, the latter have yielded a well-preserved palynological assemblage. Tintinnida, remains of Foraminifera, and the abundance of Acritarcha point to marine conditions.

Size class: microfossils

Preservation: original sporopollenin

Collection methods: core, 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 26380: 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
? Cycadopites sp. Wodehouse 1933
 Life -
Acritarcha spp. Evitt 1963 acritarcs
 Gymnospermophyta -
Vitreisporites pallidus Nilsson 1958
? Lundbladispora spp. Balme 1963