The meteorite exhibits numerous shock effects including (1) development of undulose to weak mosaic extinction in low-Ca pyroxene; (2) dispersion of metal-sulfide blebs within silicates causing "darkening"; (3) incomplete impact melting wherein some relict chondrules survived; (4) vaporization of ...
in tropical and subtropical regions. Nephilids have a sparse fossil record, the oldest described hitherto being Cretaraneus vilaltae from the Cretaceous of Spain. Five species from Neogene Dominican amber and one from the Eocene of Florissant, CO, USA, have been referred to the extant genus Neph...
. Given iron meteorite parent bodies are the earliest formed protoplanets in the Solar System and have been argued to contribute volatile budget to later formed rocky embryos and planets85, it is unlikely that the core of large terrestrial planets such as Earth would not sequester some carbon ...
2,3. However, the identity and proportion of the light elements are largely unknown4,5,6,7. Carbon is one of the important potential light-element candidates in the Earth’s core because of its chemical affinity to the metallic
Its remains were discovered 30 years ago in Alberta, Canada, but palaeontologists had assumed they belonged to an already known species of pterosaur discovered in Texas, USA, named Quetzalcoatlus. The study, published in theJournal of Vertebrate Paleontology, reveals it is actually a new species ...
(b) Fears of a possible collision of a meteorite with the Earth in the near future in the manner it happened 65 million years ago that caused the mass extinction of many species including those of dinosaurs. (c) Large scale cultivation of genetically modified crops in many parts of the wor...
1. USA 2. East Asia 3. Australia 4. India Code A B C D (a) 4 2 1 3 (b) 4 1 2 3 (c) 3 1 2 4 (d) 3 2 1 4 82. Match List I with List II and select the correct answer sing the code -given below the lists. ...