Install this theme

elegantbuffalo:

The iridium layer, or K/T Boundary

The thin, grey claystone layer contains 1,000 times more iridium (REE) than the layers above and below, along with shocked quartz.  Iridium is extremely rare on Earth, but a very common/abundant element in asteroids.  This layer has been identified in 100+ places around the Earth.

This boundary marks the extinction of the non-avian dinosaurs.

Notes: 217 5/24/12 — 2:23pm Short URL: http://tmblr.co/ZxGFGxM3XoYk Filed under: #geology  #dinosaurs  #science  #layer  #Cretaceous  #iridium layer  #k/t boundary  #extinction 
 
  1. heinrichagrippa reblogged this from blamoscience
  2. a-simple-geologist reblogged this from astrotastic
  3. athomewithmulana reblogged this from crownedrose
  4. iturnedintoatree reblogged this from astrotastic
  5. consulting-auror-archwarlock reblogged this from back-in-a-flash
  6. back-in-a-flash reblogged this from elegantbuffalo
  7. thinkaboutelephants reblogged this from fyeahgeology
  8. bustopherjones reblogged this from fyeahgeology
  9. koozer reblogged this from fyeahgeology
  10. mastertreble reblogged this from fyeahgeology
  11. hiddlesnbits reblogged this from fyeahgeology
  12. fyeahgeology reblogged this from geologynerd
  13. geologynerd reblogged this from elegantbuffalo
  14. lovekatieforme reblogged this from crownedrose
  15. istellar reblogged this from i---i
  16. i---i reblogged this from astrotastic
  17. coradactyl reblogged this from multamirabilia
  18. multamirabilia reblogged this from crownedrose
  19. ajora reblogged this from astrotastic
  20. shittaste reblogged this from crownedrose
  21. neongraa reblogged this from crownedrose
  22. wildlydistorted reblogged this from astrotastic
  23. sgt-syphillus reblogged this from astrotastic