Another sketch brought to you by #paleostream!
Barosaurus in the morning mist, smaller dicraeosaurs gather around the behemoth as well. Nanosaurus barely visible on the ground.
4K notes
·
View notes
This stegosaurus is awakened by a pair of neornithischians rooting around in the moonlight.
312 notes
·
View notes
Let's Talk About BENTONITE
There's nothing worse than minding your own business, walking along in the desert when all of a sudden your feet start to feel weighted down. It gets harder and harder to pick up your feet. The mud is sticky and pulling you into the ground. That's bentonite.
Bentonite is type of very soft, plastic clay made primarily of montmorillonite clay.
Montmorillonite is a hydrous, aluminum silicate in the smectite group (often you will hear bentonite and smectite used interchangeably).
Bentonite is formed by the alteration of volcanic ash when it comes in contact with water. Clays in general form from the chemical breakdown of feldspars (check out October's posts for more on feldspar!) and when ash gets thrown in the mix something very nasty occurs: swelling clays.
Bentonite increases greatly in volume when water is added...and decreases just as much when the water evaporates or gets absorbed in the groundwater system. This causes the popcorn texture you see in badlands topography.
Popcorn texture in Brushy Basin Member, Morrison Formation, near Evil Tree Bonebed. Sauropod rib found in it.
This can also cause structural damage. That is why the building around the Wall at Dinosaur National Monument had to be repaired a few years ago. Basically, the swelling of the bentonite split the foundation.
It also becomes very dangerous to drive on or walk on when it gets wet, becoming a slurry, sticky mess.
This is the main reason why we have to wait for summer to come before we head out to the dig site. We physically cannot get there until the Mancos Shale bentonite is dry enough to drive on.
Bentonite is not all bad though. It has some good uses too.
We actually use it to trap moisture in our skin and hair when we dry out. It's a natural sunblock and relieves burns and itching from bug bites. We even put it in Wendy's Frosty's to give them that smooth texture!
Bentonite is also used in agriculture as a natural pesticide, herbicide, and fungicide in fertilizers.
They also use it to coat drills in the oil industry to keep the drill bit lubricated, as well as coating well walls to keep them from collapsing. If you're a geek, like me, think Avatar, the Last Air Bender and the Fire Nation drill.
Hope you learned a little about bentonite today! Fossilize you later!
54 notes
·
View notes
don't worry, marine ecosystems are getting their own polls
152 notes
·
View notes
Another sketch brought to you by #paleostream
Go back, you disturbed the Brontosaurus!
2K notes
·
View notes
What was meant to be concept art for a school assignment turned into my first true piece of Paleoart
An Allosaurus fragilis wanders the savannahs of the Morrison Formation 150 million years ago. The black stripes contrasting with the bright & sandy patches help break up It's outline against investigative prey and conceal It's Eyes and Earth from fearless attackers
83 notes
·
View notes
Made a new more dynamic scale model for making refference scenes so expect this man in various dangerous situations
(Species left to right: Ornitholestes, Mesadactylus, Docodon, Harpactognathus, and Kepodactylus)
22 notes
·
View notes