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A preliminary scanning electron microscope study of honeycomb weathering of sandstone in a coastal environment
Author(s) -
McGreevy J. P.
Publication year - 1985
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/esp.3290100509
Subject(s) - weathering , quartz , scanning electron microscope , geology , gypsum , mineralogy , crystallization , mineral , carboniferous , geochemistry , geomorphology , materials science , composite material , chemical engineering , metallurgy , structural basin , paleontology , engineering
Honeycomb weathering has been observed in a Carboniferous sandstone at a coastal location near Ballycastle on the north coast of Northern Ireland. Specimens of this sandstone have been analysed by X‐ray diffraction, scanning electron microscopy, and energy dispersive spectrometry. Results reveal that calcium sulphate (gypsum) is the only salt present and is found only at and immediately below the rock surface. SEM observations suggest that crystallization of salts in pores could easily dislodge quartz grains to promote granular disintegration, whilst etching of quartz grain surfaces attests to chemical weathering activity within the rock However, the reason for the development of the honeycomb pattern is not known.