physical-geological model
81Theoretical astronomy — Nucleosynthesis Stellar nucleosynthesis Big Bang nucleosynthesis Supernova nucleosynthesis Cosmic ray spallation …
83Caesium — xenon ← caesium → barium Rb ↑ Cs ↓ Fr …
84Helium — otherusesHelium (He) is a colorless, odorless, tasteless, non toxic, inert monatomic chemical element that heads the noble gas group in the periodic table and whose atomic number is 2. Its boiling and melting points are the lowest among the… …
85Cosmic ray — For the film, see Cosmic Ray (film). Cosmic radiation redirects here. For some background types of cosmic radiation, see cosmic background radiation and cosmic background. The energy spectrum for cosmic rays Cosmic rays are energetic charged… …
86Sea level — For the sea level change associated with the current episode of global warming, see current sea level rise. For other uses, see Sea level (disambiguation). This marker indicating the sea level is placed on the path from Jerusalem to the Dead Sea …
87Adam's Bridge — (Tamil: ta. ஆதாம் பாலம் transl|ta|āthām pālam ), also known as Rama s Bridge or Ram Setu (Tamil: ta. இராமர் பாலம் transl|ta|irāmar pālam , Sanskrit: sa. रामसेतु IAST|rāmasetu ) [also spelled Rama Setu , Ram Sethu , Ramasethu and variants.] , is a …
88Copley Medal — The Copley Medal awarded to Mendeleev in 1905 …
89Tollmann's hypothetical bolide — Alexander Tollmann s bolide, proposed by Kristen Tollmann and Tollmann (1994), is a hypothesis presented by Austrian geologist Dr. Alexander Tollmann, suggesting that one or several bolides (asteroids or comets) struck the Earth at 7640 BCE… …
90Ore genesis — The various theories of ore genesis explain how the various types of mineral deposits form within the Earth s crust. Ore genesis theories are very dependent on the mineral or commodity. Ore genesis theories generally involve three components:… …
