Spheroidal weathering, Myot Hill

Maker
Thomas McInnes
Production date
1978
Description
View of a circular shape on exposed rock caused by spheroidal weathering.
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Object Detail


Department
Production date
1978
Subject notes
Spheroidal weathering is the separation of shells of decayed rock. It is most developed in rocks like basalt and dolerite which are readily decomposed. Water penetrates the intersecting joints and the corners become progressively more rounded. As each shell breaks loose, a new surface is attacked.

Myot Hill is part of a quartz and(?) olivine dolerite sill which runs from east to west. Sills are intrusions of magma into the horizontal bedding plane of sedimentary rocks.
Accession number
P04833

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