Whitby Mudstone

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

Whitby Mudstone
Stratigraphic range: Toarcian (Falciferum-Bifrons)
~
East Cliff near Whitby
TypeGeological formation
Unit ofLias Group
Sub-unitsMembers:
  • Fox Cliff Siltstone
  • Peak Mudstone
  • Alum Shale
  • Mulgrave Shale
  • Grey Shale
UnderliesInferior Oolite or Ravenscar Groups
Or Blea Wyke, Dogger or Bridport Sand Formations
OverliesMarlstone Rock or Cleveland Ironstone Formations
ThicknessUp to 120 m (390 ft)
Lithology
PrimaryMudstone
OtherSiltstone
Location
Coordinates54.5°N 0.6°W / 54.5; -0.6
Approximate paleocoordinates42.5°N 9.3°E / 42.5; 9.3
RegionYorkshire, Worcestershire
Country England
ExtentCleveland & Worcester Basins & East Midlands Shelf
Type section
Named forWhitby
LocationCoastal exposures from Hawsker Bottoms to Whitby Harbour
Whitby Mudstone (the United Kingdom)
Whitby Mudstone (England)
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