Reference Entry

ball and pillow structure

Michael Allaby

in A Dictionary of Geology and Earth Sciences

Fourth edition

Published in print January 2013 | ISBN: 9780199653065
Published online September 2013 | e-ISBN: 9780191744334
ball and pillow structure

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A *sedimentary structure occurring on the base of some *sandstones which are interbedded with *mudstones, and characterized by globular protrusions and isolated pillows of sandstone found in the underlying mudstone. These structures form by the differential settling of the unconsolidated sand into less dense mud below....

Reference Entry.  53 words. 

Subjects: Earth Sciences and Geography

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