The Proceedings of the Eighth International Conference on Creationism (2018)

Coulson ◀ Stromatolites ▶ 2018 ICC 381 Figure 7 . Meso-scale context from which to understand micro-scale spicule networks in figure 6. All scale bars = 1 cm. A. Idealized illustration of concave-down laminations. The small image within the illustration is the same as that in B. Position of core sample is not precise, but merely reflects its likely position within the original microbialite given the top right to bottom left orientiation of laminations. B. Core sample shown in A clearly showing mm-scale laminations. The lighter colored material is micrite while the darker colored material is representiative of linked sponge spicule networks. C. The other half of the core in B was thin-sectioned. This image is a photo of that thin-section. The darker gray color has been added to the image to show the location of sponge spicule networks in relation to the micrite (lighter gray). The blacked out section is a packstone pocket. The image center-right superimposed over the photo is the micro-graph from figure 6B (although reversed), showing that these sponges were actually encrusting the microbialite and were not hash washed in from another source. Image in B modified and used with permsion SEPM, Coulson and Brand (2016).