Ian Coleman has contributed these images and links covered in last year's workshop. Thanks, Ian!
240 Ma to 250 Ma into the future.
Inferior Oolite Ammonites
The rocks are exposed from Dorset and Somerset eastwards and northwards through the English Midlands to Yorkshire. It is present at depth in the Wessex-Weald Basin, where it reaches its greatest thickness of 120 m.
Lithology and stratigraphy. The group consists of up to 120 m thickness of oolitic limestones and subordinate sandstones and mudstones laid down during the Jurassic Period. In the East Midlands it consists of (in descending order i.e. oldest last) the Lincolnshire Limestone, Grantham and Northampton Sand formations whereas in the Cotswold Hills it consists of the Salperton Limestone, Aston Limestone and Birdlip Limestone formations. The limestones are rich in organic material. The ammonite Parkinsonia parkinsoni, an index fossil for the Bathonian, is native to the Inferior Oolite of Burton Bradstock.
Link to New Scientist article
Jurassic Flowers 174 Ma.
Link to article
Greywacke (turbidite deposit)