A Geological History of Yorkshire Dr Liam Herringshaw

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A Geological History of Yorkshire Dr Liam Herringshaw Palaeontologist, Hidden Horizons Director, Yorkshire Fossil

A Geological History of Yorkshire Dr Liam Herringshaw Palaeontologist, Hidden Horizons Director, Yorkshire Fossil Festival

Ordovician Ingleton Group, Pecca Falls Quarry Acritarch microfossils

Ordovician Ingleton Group, Pecca Falls Quarry Acritarch microfossils

Ordovician granite

Ordovician granite

Silurian turbidites Austwick Formation, Horton-in-Ribblesdale

Silurian turbidites Austwick Formation, Horton-in-Ribblesdale

Devonian – missing! CARBONIFEROUS ROCKS ORDOVICIAN ROCKS England Scotland collided! Thornton Force unconformity

Devonian – missing! CARBONIFEROUS ROCKS ORDOVICIAN ROCKS England Scotland collided! Thornton Force unconformity

Dales limestones Early Carboniferous • Early Carboniferous – Great Scar Limestone Group

Dales limestones Early Carboniferous • Early Carboniferous – Great Scar Limestone Group

Blocks and basins • Early Carboniferous shales Bowland Shales, Bolton Abbey

Blocks and basins • Early Carboniferous shales Bowland Shales, Bolton Abbey

Hydration Break

Hydration Break

Late (proper!) Carboniferous Pennine Coal Measures Group divided in 3 (Lower, Middle, Upper)

Late (proper!) Carboniferous Pennine Coal Measures Group divided in 3 (Lower, Middle, Upper)

Late Carboniferous Millstone Grit – tough sandstones

Late Carboniferous Millstone Grit – tough sandstones

Late Carboniferous Yoredale Cycles (Phillips 1836) 1. Limestone -----4. Mudstone / coal 3. Sandstone

Late Carboniferous Yoredale Cycles (Phillips 1836) 1. Limestone -----4. Mudstone / coal 3. Sandstone 2. Shales 1. Limestone -------4. Mudstone / coal From Tucker et al. (2009)

Permian Magnesian Limestone

Permian Magnesian Limestone

Permian potash! Woodsmith Mine, nr Whitby

Permian potash! Woodsmith Mine, nr Whitby

On the shores of the Zechstein Sea

On the shores of the Zechstein Sea

Ripon yarns Dissolving Permian rocks = sinkholes (and Alice holes)

Ripon yarns Dissolving Permian rocks = sinkholes (and Alice holes)

Triassic • Sherwood Sandstone • Mercia Mudstone Sherwood Sandstone quarry, North Notts

Triassic • Sherwood Sandstone • Mercia Mudstone Sherwood Sandstone quarry, North Notts

T Break

T Break

Early Jurassic Hildoceras bifrons Mostly marine mudstones Saltwick Nab

Early Jurassic Hildoceras bifrons Mostly marine mudstones Saltwick Nab

Middle Jurassic Scarborough’s meandering dinosaurs

Middle Jurassic Scarborough’s meandering dinosaurs

Oo, Late Jurassic lobsters! • Filey Brigg

Oo, Late Jurassic lobsters! • Filey Brigg

Early Cretaceous • Speeton Clay

Early Cretaceous • Speeton Clay

Late Cretaceous Flamborough Chalk • Selwicks Bay

Late Cretaceous Flamborough Chalk • Selwicks Bay

Cenozoic • Faults, folds, and dykes Cleveland Dyke Flamborough folds

Cenozoic • Faults, folds, and dykes Cleveland Dyke Flamborough folds

Quaternary 1821: Bones found, Kirkdale Cave 1822: Buckland enters a hyaena den

Quaternary 1821: Bones found, Kirkdale Cave 1822: Buckland enters a hyaena den

Quaternary: Holderness Soft, young, Ice Age deposits, full of exotics!

Quaternary: Holderness Soft, young, Ice Age deposits, full of exotics!

Image from Hall et al. (2010)

Image from Hall et al. (2010)

In conclusion OLDEST YOUNGEST

In conclusion OLDEST YOUNGEST

Find out more: www. fossilhub. org Email: lgh 865@hotmail. com • Hidden Horizons The

Find out more: www. fossilhub. org Email: lgh 865@hotmail. com • Hidden Horizons The Fossil Shop, 65 a Eastborough, Scarborough: • https: //www. eventbrite. co. uk/o/hidden-horizons-5979675763 • https: //www. facebook. com/Hidden. Horizons. Ltd/ • Yorkshire Fossil Festival Scarborough, September 11 th & 12 th 2021. • @Yorks. Fossil. Fest on Twitter and Facebook • Geology Hull