Today is #FossilFriday & I taught my humans that to be a #fossil the specimen needs to be at least 10.000 a old. That doesn't hold for this #corals, but this is basically how fossils of corals look like. We found them during #hedgewatch on the #Seychelles.
Found a puzzling object while out on a walk. At first I thought it was a piece of driftwood but it’s very heavy rock. We get fossilised wood in this area but we also get slag from old smeltworks, so I’m used to finding both. I did wonder if it’s a knotty bit of fossilised wood but maybe it’s a weird bit of slag? The pattern on the lumpy bits is absolutely beautiful #fossil#rocks#geology#slag
Happy spring from the Flatirons: a Pennsylvanian-age sandstone/conglomerate made of debris from the ancestral Rocky Mountains, and tilted upward by the Cretaceous-Paleogene Laramide Orogeny. 🧪 #Geology#Geoscience#RockAreAmazing
Any #geology nerds out there? Found this picture I took down in the Big Bend region of Texas. I get that the effect is caused by harder layers of stone that resist the erosion more than the others. Question is what are the harder layers made of and why do they form in somewhat regular intervals?
#Thundereggs usually look like ordinary rocks on the outside, but slicing them in half and polishing them may reveal intricate patterns and colors. Read more here:
Eye #agate a captivating gemstone, is named for its mesmerizing patterns that resemble eyes. These "eyes" are formed by alternating layers of differently colored minerals, such as chalcedony, quartz, and jasper. Read more here:
I would like to build a small thingy to display UV-active minerals, and I wanted to use LEDs rather than tubes for a number of reasons.
Does anybody know if there are LEDs in all three useful bands (UV-A, UV-B and UV-C) and if they are any good? That is, is my project even possible or is it doomed from the beginning?