Zoom in for the clues. The lines are not radiating out from the village, but from the cattle kraals. These kraals are irregular enclosures built of acacia thorn, agave and other thorny bushes. The cattle are kept in these kraals at night to protect them from hyenas and packs of wild dogs. The cattle themselves are likely African longhorn or various local ...


That is a sea urchin (echinoid) or at least part of one. the pattern of plates is fairly distinctive. 2 rows of small plates alternating with 2 rows of large plates. I am not familiar enough with urchin phylogeny to give you species but you might be able ot get it from the biology stack.


Yes, this is a rather nice find; an ammonite of the Jurassic in central Europe. Given the size of the specimen, and its appearance, this appears to be of the species Cardioceras, or Perisphinctes. These ammonoids belong to the Class Cephalopoda, the coiled cephalopods. They lived about 160 million years ago. The Order of ammonites to which Cardioceras and ...


The place is called Urðarháls. I could not find much information about it in the scientific literature... It is mentioned in Sigmarsson & Halldórsson (2015): they say it's an interglacial basaltic shield volcano, possibly associated with the Askja volcanic system. The fact that the volcano was eroded by glaciers probably explains the colour difference ...


What is happening here? Photoshop! The number of visible satellites plummets towards the middle of the night when more satellites fall into the shadow of the Earth, represented by the dark area on the left of the image. (emphasis added)


According to this geological map of iceland it is the Urðarháls, an interglacial shield, i.e. a dolomite shield volcano that got scraped by glacial activity The hole in the middle is the pit crater. You can find some cool pictures of it if you google the name with the correct icelandic letters.


Well given that travertine springs trail is right next door, in castle rocks state park I am going to guess travertine. Which is a calcium carbonate mineral deposited from geothermal springs, hot ground water brings up the dissolved travertine which is deposited as the hot water evaporates, but can also slowly be dissolved and redeposited by rain. Thy can ...


Definitely an echinoid (sea urchin) and they are often found in the flints in the chalk cliffs along the south coast of the UK. Seaford in Sussex is particularly well known for these types of fossils.


From my own experience of being a geologist for close to fifteen years, flow charts like that are of very limited use. The truth that you probably did not want to hear, is that it takes years of experience and education to learn how to identify minerals. For example, olivine is defined in your chart as "no streak, cannot be scratched, green, grainy"...

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