Facies (Petrology 💎)

In geology, a facies is a body of rock with distinctive characteristics. The characteristics can be any observable attribute of rocks and the changes that may occur in those attributes over a geographic area. A facies encompasses all the characteristics of a rock including its chemical, physical, and biological features that distinguish it from adjacent rock. The term "facies" was i...

https://en.wikipedia.org/wiki/Facies

#Facies #Petrology #Stratigraphy #SedimentaryRocks

Volcaniclastics (Volcanology 🌋)

Volcaniclastics are geologic materials composed of broken fragments of volcanic rock. These encompass all clastic volcanic materials, regardless of what process fragmented the rock, how it was subsequently transported, what environment it was deposited in, or whether nonvolcanic material is mingled with the volcanic clasts. The United State...

https://en.wikipedia.org/wiki/Volcaniclastics

#Volcaniclastics #Petrology #Volcanology #VolcanicRocks #SedimentaryRocks

Dunham classification (Petrology 💎)

The Dunham classification system for carbonate sedimentary rocks was originally devised by Robert J. Dunham in 1962, and subsequently modified by Embry and Klovan in 1971 to include coarse-grained limestones and sediments that had been organically bound at the time of deposition. The modified Dunham Classification has subsequently become the ...

https://en.wikipedia.org/wiki/Dunham_classification

#DunhamClassification #Limestone #Petrology #SedimentaryRocks

Ferricrete (Pedology 🟤)

Ferricrete is a hard, erosion-resistant layer of sedimentary rock, usually conglomerate or breccia, that has been cemented into a duricrust by iron oxides. The iron oxide cements are derived from the oxidation of percolating solutions of iron salts. Ferricretes form at or near the land surface and may contain non-local sediments that have been transported from outside...

https://en.wikipedia.org/wiki/Ferricrete

#Ferricrete #Pedology #SedimentaryRocks #AnglophoneCentric

Stylolite (Petrology 💎)

Stylolites are serrated surfaces within a rock mass at which mineral material has been removed by pressure dissolution, in a deformation process that decreases the total volume of rock. Minerals which are insoluble in water, such as clays, pyrite and oxides, as well as insoluble organic matter, remain within the stylolites and make them visible. Sometimes h...

https://en.wikipedia.org/wiki/Stylolite

#Stylolite #Limestone #Petrology #SedimentaryRocks #StructuralGeology

Researchers at the Research on geological deposits at the FRM II characterized the networks of #micropores in #sedimentaryrocks to find out whether they are suitable as impermeable layers for #nuclearwaste repositories and #CO2storage sites: http://go.tum.de/216311

#neutrons

📷B.Ludewig