A4: TURKEY CURUK DAG SITE: Photos beginning at 0.7 m

This page authored by Steve Kershaw


Photos on this page show stromatolites near the base , of the microbialite. The log below shows enlargement of the basal part of the sequence and photos under the log can be matched to the log cartoons, which are based on the photos. Thus field views of stromatolite domes, mini-stromatolites and hybrid stromatolites are all shown here. You can have fun figuring out which is which. The prominent stylolite in two photos demonstrate the problems of interpreting environmental change in this sequence.

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Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Log of Çürük Dag microbialite sequence, derived from Kershaw et al. (2010 in Sedimentology; photos below are from the lowermost 160 cm of log as shown on the right column of the above diagram.

Three photos below show field views of the lower stromatolite between 50-80 cm of the right log above.

The photo below shows a polished vertical section of the stromatolite.

The two photos below show the topmost part of the stromatolite and lowermost part of the overlying hybrid microbialite, between 75 - 90 cm on the right hand log at the top of this page. Note the prominent stylolite that interrupts the sequence, so that the relationship between top of stromatolite and base of hybrid microbialite is not known.

NOTE: thin section views of hybrid microbialites are shown on the page for 2.7 m of the log at Çürük Dag

The two photos below show the mini-stromatolite columns at 110 - 117 cm on log at top right of this page. In thin section these columns are made almost entirely of cement fans, despite their appearance in these photos. Thus, they ARE layered, but the layering shows the development of crystals. Such features show the problems of the field classification of stromatolites as layered deposits: you need to see thin sections to be able to verify the structure. After that come the problems of interpreting how these formed !

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