Friday, 19 September 2008

Image of the week #3

Another one from the Suez Rift. This is my former colleague Chris Ott (hi Chris!), standing in front of a syn-rift boulder conglomerate containing various pre-rift and syn-rift clasts (the one to the right of Chris is probably a Precambrian basement basalt clast). These are actually some of the smaller clasts in the conglomerate: lower down in the same unit there are limestone blocks that are several tens of metres across, which makes mapping in the area "interesting". The unit is in the steeply dipping limb of a fault-propagation syncline in the hanging wall of a major block-bounding normal fault that was active during deposition. It is interpreted as a debris flow triggered by slope collapse.

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