Composition, Texture, & Classification of Sedimentary rocks / Sed Strat #1 | GEO GIRL

Sedimentary rocks can be divided into three major groups depending on their formation: clastic, chemical, and biogenic sedimentary rocks. Clastic rocks (also called detrital) form by accumulation, compaction, and lithification of detrital sediment. Examples of clastic rocks include conglomerate, breccia, sandstone, siltstone, and claystone/shale. Chemical rocks form by precipitation from solution. Examples of chemical rocks include evaporites like gypsum, halite, sylvite, and some carbonates. Biogenic rocks form by biological processes. Examples of biogenic rocks include chalk, shell-dominated rocks like coquina, coal, and some types of silica deposits. Sedimentary rocks can also be separated into two major groups: endogenetic and exogenetic. The distinction between endogenetic and exogenetic rocks is similar to the difference between clastic and chemical rocks. But other ways to define these rocks is as intrabasinal or extrabasinal and authigenic or allogenic. For example, fossiliferous limestones may be clastic or detrital and allogenic, but at the same time, intrabasinal. Regardless of formation process or provenance, clastic and chemical rocks are classified by separately. Clastic rocks are classified by grain size. Chemical rocks are classified by composition and texture. The textures of clastic and chemical rocks are very different. Clastic rocks have tangential grain boundaries allowing porosity and permeability, whereas chemical rocks have continuous grain boundaries and negligible porosity and permeability.

References: Sedimentary Rocks by Pettijohn: https://amzn.to/3tnWuVu
Sedimentology and Stratigraphy by Boggs: https://amzn.to/31VIG9x

GEO GIRL Website: https://www.geogirlscience.com/ (visit my website to see all my courses, shop merch, learn more about me, and donate to support the channel if you'd like!)

0:00 video outline
1:15 what is a sedimentary deposit?
1:34 2 types of sedimentary rocks
2:04 Exogenetic vs endogenetic
5:23 similarities between igneous & sedimentary rocks
6:37 sedimentary textures
7:43 sedimentary structures
9:13 intrabasinal vs extrabasinal
11:36 hybrid sedimentary rocks?
14:00 porosity & permeability
16:57 allogenic vs authigenic minerals
20:00 effect of diagenesis on sedimentary rocks
21:09 major types of sedimentary rocks
22:27 upcoming videos & references

Hey there, Earth enthusiast! Check my favorite Earth-friendly products:
Bamboo toilet paper: https://shrsl.com/3cvku
Bamboo paper towels: https://shrsl.com/3cvkw
Compostable tableware: https://shrsl.com/3cvkz
Compostable trash bags: https://shrsl.com/3cvl0
Bamboo cutlery + straw! : https://shrsl.com/3cwfl
Eco-Friendly Tote (great for grocery shopping!): https://shrsl.com/3cwfp
Reusable straws + cleaning brushes (my fav!): https://shrsl.com/3cwft
Eco-friendly laundry detergent: https://shrsl.com/3cwgo

Directly offset your carbon footprint with Wren: https://shrsl.com/3d0t2
(Just click link, press get started, take the free C footprint quiz, then choose how much you want to reduce your footprint by donating to the C sequestration projects they're funding!)

Non-textbook books I recommend:
Oxygen by D. Canfield: https://amzn.to/3gffbCL
Brief history of Earth by A. Knoll: https://amzn.to/3w3hC1I
Life on young planet by A. Knoll: https://amzn.to/2RBMpny
Some assembly required by N. Shubin: https://amzn.to/3w1Ezm2
Your inner fish by N. Shubin: https://amzn.to/3cpw3Wb
Oxygen by N. Lane: https://amzn.to/3z4FgwZ
Alien Oceans by K. Hand: https://amzn.to/3clMx1l
Life's Engines: https://amzn.to/3w1Nhke

Tools I use as a geologist/teacher/student:
Geology field notebook: https://amzn.to/3lb6dJf
Geology rock hammer: https://amzn.to/3DZw8MA
Geological compass: https://amzn.to/3hfbdLu
Geological hand lens: https://amzn.to/3jXysM5
Camera: https://amzn.to/3l6fGRT
Carbon-neutral pencil bag: https://shrsl.com/3cvjv
Carbon-neutral backpack: https://shrsl.com/3cvkc

Disclaimer: Links included in this description might be affiliate links. If you purchase a product or service with the links that I provide I may receive a small commission, but there is no additional charge to you! Thank you for supporting my channel so I can continue to provide you with free content each week! And as always, let me know your topic suggestions in the comments down below!

• #science_technology
• #geology
• #geology_crash_course
• #earth_science