JET

Integrated understanding of the early Jurassic Earth system and Timescale

The initial workshop developed plans for an ICDP borehole that will recover a complete Early Jurassic sedimentary record at the site of a previously drilled borehole at Llanbedr (Mochras Farm), on the eastern margin of the Cardigan Bay Basin, Wales. However, a new site was chosen and approved in December 2018 that fulfills and even exceeds the initial science objectives for the Mochras redrill. The new site Prees, located in the Cheshire Basin (Shropshire, England), and close to a former oil and gas exploration well, will recover approximately 850 m of primarily latest Triassic to Early Jurassic Strata, including the Jurassic-Triassic boundary. This new section is ideal for an integrated astrochronology, chemostratigraphy, biostratigraphy, and magnetostratigraphy which, combind with data being generated from the old Mochras core will become the international standard for these 25 million years of Earth history.

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