Rocks near Blackness Castle, showing rock jointed due to contraction on cooling

Object detail

Department

Photo

Maker

Thomas McInnes

Production date

24 Aug 1978

Subject place

Blackness Castle/Blackness/Bo'ness area

Subject notes

The rock is an igneous sill of teschenite. Intruded between beds of Upper Oil Shale Group sedimentary rocks, it has been exposed by erosion. During cooling from the molten magma state, the rock has contracted and joints have formed.

A sill is formed by igneous rock intruded horizontally along the bedding plane of sedimentary rock. The rock next to the intrusion is metamorphosed by the heat.

See locality field card

Accession number

P04171

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Subject category

teschenite igneous rock Geology Upper oil shale group Calciferous sandstone series carboniferous

Image auto tags

Rock Green Wall Bedrock Cobblestone Geology Stone wall Granite Igneous rock Geological phenomenon

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