Eye of the Sahara

The Richat Structure in the Sahara desert of Mauritania. This structure is a deeply eroded, slightly elliptical, 40 km in diameter, dome. The sedimentary rock exposed in this dome ranges in age from Late Proterozoic within the center of the dome to Ordovician sandstone around its edges.

Initially interpreted as an asteroid impact structure because of its high degree of circularity, it is now argued to be a highly symmetrical and deeply eroded geologic dome. Despite extensive field and laboratory studies, geologists have found a lack of any credible evidence for shock metamorphism or any type of deformation indicative of a hypervelocity extraterrestrial impact. While coesite, an indicator of shock metamorphism, had initially been reported as being present in rock samples collected from the Richat Structure, further analysis of rock samples concluded that barite had been misidentified as coesite.

In addition, the Richat Structure lacks the annular depression that characterizes large extraterrestrial impact structures of this size. Also, it is quite different from large extraterrestrial impact structures in that the sedimentary strata comprising this structure is remarkably intact and “orderly” and lacking in overturned, steeply dipping strata or disoriented blocks.

  1. ludvikvh reblogged this from travelthisworld
  2. milo-in-lights reblogged this from nut-sacks
  3. distortedthovght reblogged this from scars-of-hallucination
  4. scars-of-hallucination reblogged this from obsolete-oblivion
  5. obsolete-oblivion reblogged this from alien-geometry
  6. alien-geometry reblogged this from balconyblunts
  7. nut-sacks reblogged this from hullocolin
  8. pinoykickz reblogged this from live--optimistically
  9. keithrichardsisasexyfuck reblogged this from travelthisworld
  10. b006 reblogged this from terra-mater
  11. zombiegravy reblogged this from travelthisworld
  12. jormungandrising reblogged this from proserpine-in-phases
  13. proserpine-in-phases reblogged this from jumpingjacktrash
  14. brutalhonesttruths reblogged this from travelthisworld
  15. wanderingtardis reblogged this from travelthisworld
  16. aaronyao reblogged this from travelthisworld
  17. unvarnished-thoughts reblogged this from travelthisworld
  18. smellsliketime reblogged this from order-zeff
  19. ezelloharius reblogged this from nonsolum
  20. addie-aynsley reblogged this from travelthisworld
  21. nonsolum reblogged this from obscurus-nox
  22. lylzie reblogged this from travelthisworld
  23. mercymariner reblogged this from cameoappearance
  24. nichu reblogged this from ikilledlaurapalmer
  25. ikilledlaurapalmer reblogged this from obscurus-nox
  26. unapologeticgleek reblogged this from travelthisworld
  27. order-zeff reblogged this from thiswhitewidow
  28. creepyfantasyart reblogged this from thiswhitewidow

Theme NIGHTNIGHT by DEDDY