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Obelisk

Portland Stone: Whitbed

  • Sedimentary
  • Oolitic Limestone
  • Upper Jurassic

Location Details

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Location of Geological Feature
The stone used for the obelisk. This is 18th Century Portland Stone and the weathering shows up the oolitic texture very well. Some parts of the stone are almost 'Roach' facies, with leached-out fossils forming cavities.
Fossils
Oysters, Trigonids and Aptyxiella gastropods
Rock Type
Oolitic Limestone
Geological Age
Upper Jurassic
Quarry Location
Isle of Portland, Dorset, UK.
Category
Sedimentary
Nearest station
Lambeth North
Address
St George's Circus SE1
Building architect
Robert Mylne
Date of build
1771
Obelisk — Portland Stone: Whitbed
Portland Stone: Whitbed at Obelisk
Portland Stone: Whitbed at Obelisk (detail 2)
Portland Stone: Whitbed at Obelisk (detail 3)
    Entry submitted by Ruth

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