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wave action, zone of

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(scanning error, page in motion; cropped to square, inverted)
Plate 37, Subbituminous or bituminous coal
A. section (×100), crosswise to the bedding...
ex David White and Reinhardt Thiessen, The Origin of Coal, with a chapter on the formation of peat by Charles A. Davis; Bulletin 38, Department of the Interior, Bureau of Mines (1913)
NYPL copy, digitized April 27, 2006
raw source

wl, woody laminae or fragments; lr, light resinous bodies...

At such times the true coast line was doubtless locally obliterated, except in so far as barrier beaches marked the zone of wave action and bordered the expanses of open water.     53
 

2 September 2018
tags: coal; littoral; un; waves; David White; Reinhardt Thiessen