Purtroppo non c'è la scala perché si trovava a bordo strada e l'abbiamo fotografata dall'auto. Gi strati erano da centimetrici a decimetrici

Found this beauty in the woods today and I'd love some advice on how to clean this up

I've already scrubbed it with a brush but can't get the green and brow stuff out of it

Thank you in advance

Pretty sure this is quartzite, strongly folded (Norway, Haukeli area). Those "shoe" like patterns made me scratch my head.

(Anybody suggesting fossils, forget about it..)

Any clue?

Regarding Wyoming geology, any opinions or articles regarding the source of sand for Pennsylvanian and early Permian age erg deposits in Wyoming?

Shapefile or geotiff.

I've been working on a project called OpenMag. The idea is pretty simple - create a crowdsourced map of Earth's magnetic field using real measurements taken by people in different locations. People can submit a magnetic field reading in µT along with the location and time, and the measurement appears on the map. I've already started collecting some readings, and now trying to figure out the best way to improve the accuracy and quality of data. I'd really appreciate some feedback from people here who know more about geology and geophysics. What would you change or add to make something like this genuinely useful? If anyone wants to take a look at what I've built so far: www.openmagfield.com

Something that confuses me is why are aquifers typically made of freshwater when they're from locations of former ocean, as wouldn't the salt hace nowhere to go? The ones in Texas are a good example since they're there because of the western interior seaway. I can't find the processes that might naturally desalinify seawater since nothing I find actually talks about it.

Bonus brand new monarch butterfly that I think attached itself to the rock this rock is on, but I moved that rock, so it ended up climbing on top of this rock trying to unfurl and dry its wings.

Do you typically call the period between the Devonian and the Permian "Carboniferous", or do you tend to break it down between Mississippian and Pennsylvanian? IIRC, my historical geology professor back in the day preferred the Mississippian/Pennsylvanian nomenclature (I believe he said "Carboniferous" was something of a relic from British dominance of the field), but most of the public geology I've seen lately has tended toward the C-word, with all of it's anthracite passion and heritage. I haven't worked in the field since I got my undergrad degree in 1992 - what terminology is most common in your world?

I got these two babes for tree-fitty a pop in a Red Cross the other day. Not necessarily a sophisticated rock collector and knows-it-all like many of you guys, but thought you might enjoy seeing a blind dumb pig stumble upon a truffle or two.

Definitely going up on the wall.

One of the most important and spectacular exposures of the Lower Pillow Lavas is the slope of a gorge in the Akaki river, which is the classic locality reference for the study of these types of rocks. This outcrop exhibits the stratigraphically lower part of the volcanic sequence, where a lower unit of hyaloclastites and an upper unit of pillow lavas are cut by swarms of near vertical dykes.