The origin and occurrence of subaqueous sedimentary cracks
mediaposted on 22.11.2016 by Sean McMahon, Ashleigh van Smeerdijk Hood, Duncan McIlroy
Media is any form of research output that is recorded and played. This is most commonly video, but can be audio or 3D representations.
Video of a micro-CT scan through a hand-sample showing molar tooth cracks from the Monteville Formation, South Africa (c. 2.6 Ga). These ptygmatic to linear cracks occur in swarms in finer carbonate-clay beds of the formation and are filled with very finely crystalline calcite spar. The field of view is about 5 cm across.