Category: Under the microscope

January 31, 2022

Glauconite – an important stratigraphic and paleoenvironmental indicator Glauconite is one of the most recognizable

January 19, 2022

Two important contributors to bioclastic limestones – foram tests and skeletal sponge spicules Foraminifera

January 9, 2022

Bryozoa – are a complex but important group of reef and non-reef invertebrates and

January 8, 2022

Echinoderms and barnacles are important contributors to bioclastic limestones Echinoids are a diverse phylum with

January 7, 2022

Molluscan bioclasts are important components of tropical, and cool-temperate water limestones Bioclasts are probably the

October 19, 2021

Petrographic (optical, polarizing) microscopes open doors to the architecture of rocks – crystals, grains, cements

September 14, 2021

Greywacke petrography On the outside, greywacke is generally presented in varying shades of grey commonly

September 10, 2021

The selection of sandstones in plain polarized light (left) and crossed nicols (right) shown here

May 13, 2021

See also the companion Glossary of Petrography and Petrology Absolute zero: The theoretical temperature, measured

December 19, 2019

Pressure solution and stylolite formation in carbonates. This is part of the How To…series on