Katran çukuru

Tierra La Brea'da bir katran çukuru

Katran çukuru veya asfalt çukuru, büyük asfalt birikintileridir. Çürümüş organik maddenin yeraltında basınca maruz kalmasıyla oluşan petrolün varlığında oluşurlar. Bu ham petrol çatlaklardan, kanallardan veya gözenekli tortul kaya tabakalarından yukarıya doğru sızarsa yüzeyde birikebilir.[1] Ham petrolün daha hafif bileşenleri atmosfere buharlaşarak geride siyah, yapışkan bir asfalt bırakmaktadır.[1] Katran çukurları, büyük fosil koleksiyonları içerdikleri için sıklıkla kazılmaktadır.[1]

Kaynakça

  1. ^ a b c "La Brea Tar Pits". University of California Museum of Paleontology. 6 Haziran 1997 tarihinde kaynağından arşivlendi. Erişim tarihi: 10 Mayıs 2024. 

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