Trefawr Track
id:
trefawr-track-253-1752337
title:
Trefawr Track
text:
Trefawr Track, a forestry road north of Cwm-coed-Aeron Farm, Llandovery, Wales, is the location of the Global Boundary Stratotype Section and Point (GSSP) which marks the boundary between the Rhuddanian and Aeronian stages of the Silurian period on the geologic time scale. The GSSP was ratified in 1984. The boundary is defined as the first appearance of the graptolite Monograptus austerus sequens. The section is primarily mudstone, which yields an abundance of shelly faunas. The graptolite Dipl
brand slug:
wiki
category slug:
encyclopedia
description:
UK road-demarcated geological boundary
original url:
https://en.wikipedia.org/wiki/Trefawr_Track
date created:
date modified:
2023-10-24T18:40:02Z
main entity:
{"identifier":"Q7837759","url":"https://www.wikidata.org/entity/Q7837759"}
image:
fields total:
13
integrity:
14