Experimental material

AC Alexis Cartwright-Taylor
MM Maria-Daphne Mangriotis
IM Ian G. Main
IB Ian B. Butler
FF Florian Fusseis
ML Martin Ling
EA Edward Andò
AC Andrew Curtis
AB Andrew F. Bell
AC Alyssa Crippen
RR Roberto E. Rizzo
SM Sina Marti
DL Derek. D. V. Leung
OM Oxana V. Magdysyuk
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A Permian aeolian sandstone from the Clashach quarry in Morayshire, Scotland was chosen as the experimental material. Clashach sandstone is a quartz-rich arenite composed of >92% quartz grains, <8% K-feldspar and subordinate lithics. It is well-sorted with fine to medium-sized grains 0.25–0.4 mm in diameter50. A highly cemented Clashach sample was used (17% porosity), which behaved in a mechanically brittle manner when loaded to failure at shallow crustal pressures, and emitted sufficient acoustic emissions for feedback control. Cylindrical cores of 10 mm diameter were obtained using a diamond core drill, and the ends of the cores were ground flat and parallel on a lathe to a length of 25 mm. This small sample size is required to obtain the micron-scale resolution achievable with synchrotron μCT imaging.

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