blockfieldn.
/ˈblɒkfiːld/, U.S. /ˈblɑkˌfild/ Physical Geography.
An expanse of boulders of rock broken up by frost, which may develop on flat terrain in arctic and alpine climates; a boulder field or felsenmeer.
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1906 J. G. Andersson in Jrnl. Geol. (Chicago) 14 101 The contours of these vegetationless block-fields, with all their embranchments, give the rude outlines of a small river system.
1906 J. G. Andersson in Jrnl. Geol. (Chicago) 14 103 I feel sure that these immense block-fields of Bear Island are formed in quite the same manner as the Falkland stone-runs... The only differences between the two occurrences are differences of topography and age: in Bear Island a great plain forming a stone-field, in the Falkland Islands valleys filled at the bottom by stone-rivers.
1969 C. Ollier Weathering xii. 214 Block-streams also have sharp edged and angular blocks, and occur in the same areas as blockfields.
2015 D. Tyler Uncommon Ground 129/1 The peaks and the ridge that connects them are a fine example of a blockfield, a spread of angular boulders that have been fractured and shattered by frost action.
This is a new entry (OED Third Edition, December 2022).
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n.1906