Echinoderms and barnacles are important contributors to bioclastic limestones Echinoids are a diverse phylum with
Molluscan bioclasts are important components of tropical, and cool-temperate water limestones Bioclasts are probably the
This post continues the series on volcanic and volcaniclastic rocks in outcrop, with a brief
19th century experiments that helped quantify the nature of fluid flow, surface waves, and bedforms.
Petrographic (optical, polarizing) microscopes open doors to the architecture of rocks – crystals, grains, cements
Natural analogues for full-sized fan deltas Walk any sandy beach at low water, negotiating flotsam,
Structural contour maps are the subsurface equivalent of surface topography maps. They are widely used
Here is a brief description of a submarine channel complex in the Jurassic Bowser Basin
Greywacke petrography On the outside, greywacke is generally presented in varying shades of grey commonly
The selection of sandstones in plain polarized light (left) and crossed nicols (right) shown here