Whitby Mudstone

Whitby Mudstone
Stratigraphic range: Toarcian (Falciferum-Bifrons) ~183–176 Ma PreꞒ Ꞓ O S D C P T J K Pg N
East Cliff near Whitby
Type	Geological formation
Unit of	Lias Group
Sub-units	Members: Fox Cliff Siltstone Peak Mudstone Alum Shale[note 1] Mulgrave Shale Grey Shale
Underlies	Inferior Oolite or Ravenscar Groups Or Blea Wyke, Dogger or Bridport Sand Formations
Overlies	Marlstone Rock or Cleveland Ironstone Formations
Thickness	Up to 120 m (390 ft)
Lithology
Primary	Mudstone
Other	Siltstone
Location
Coordinates	54°30′N 0°36′W / 54.5°N 0.6°W / 54.5; -0.6
Approximate paleocoordinates	42°30′N 9°18′E / 42.5°N 9.3°E / 42.5; 9.3
Region	Yorkshire, Worcestershire
Country	England
Extent	Cleveland & Worcester Basins & East Midlands Shelf
Type section
Named for	Whitby
Location	Coastal exposures from Hawsker Bottoms to Whitby Harbour
Whitby Mudstone (the United Kingdom) Show map of the United Kingdom Whitby Mudstone (England) Show map of England

The Whitby Mudstone is a Toarcian (Early Jurassic; Falciferum-Bifrons in regional chronostratigraphy) geological formation in Yorkshire and Worcestershire, England.^[1] The formation, part of the Lias Group, is present in the Cleveland and Worcester Basins and the East Midlands Shelf.

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