Dr. James Thomka on Twitter: "Beautiful local #Cambrian #sandstone sample with trough cross-bedding cross-cut by Skolithos #burrows. There is actually a lot more going on with this rock if you look carefully--enjoy! #
![GC7K5MA Credit River Valley sandstone - DP/EC 11five (Earthcache) in Ontario, Canada created by The Wandering Geologist GC7K5MA Credit River Valley sandstone - DP/EC 11five (Earthcache) in Ontario, Canada created by The Wandering Geologist](https://s3.amazonaws.com/gs-geo-images/92423222-e874-44b6-88a7-c7cdbe9de8b5.png)
GC7K5MA Credit River Valley sandstone - DP/EC 11five (Earthcache) in Ontario, Canada created by The Wandering Geologist
![Trough cross bedding in Neoproterozoic sandstones from near the Badami cave complex in the Kaladgi Basin, India. | Sandstone, Basin, Trough Trough cross bedding in Neoproterozoic sandstones from near the Badami cave complex in the Kaladgi Basin, India. | Sandstone, Basin, Trough](https://i.pinimg.com/736x/69/51/69/69516960aba19e77278bc18ac2703066.jpg)
Trough cross bedding in Neoproterozoic sandstones from near the Badami cave complex in the Kaladgi Basin, India. | Sandstone, Basin, Trough
![Planar and trough cross-stratification and horizontal lamination in... | Download Scientific Diagram Planar and trough cross-stratification and horizontal lamination in... | Download Scientific Diagram](https://www.researchgate.net/profile/P-Worsley/publication/285633879/figure/fig5/AS:669459391975452@1536622965721/Planar-and-trough-cross-stratification-and-horizontal-lamination-in-alluvial-sands_Q640.jpg)
Planar and trough cross-stratification and horizontal lamination in... | Download Scientific Diagram
![Flume studies of large-scale cross-stratification produced by migrating bed forms | Semantic Scholar Flume studies of large-scale cross-stratification produced by migrating bed forms | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/a01227919b40002b295c56ec8591d021e08aa078/163-Figure40-1.png)
Flume studies of large-scale cross-stratification produced by migrating bed forms | Semantic Scholar
![31. Trough cross bedding at Houghton Green Cliff, Rye. Direction: west. | Download Scientific Diagram 31. Trough cross bedding at Houghton Green Cliff, Rye. Direction: west. | Download Scientific Diagram](https://www.researchgate.net/publication/316274822/figure/fig53/AS:485146110500868@1492679254350/Trough-cross-bedding-at-Houghton-Green-Cliff-Rye-Direction-west.png)