Abstract Graphite in metasedimentary rocks of the Eoarchean Saglek-Hebron Gneiss Complex (Canada) is depleted in 13C and has been interpreted as one of the oldest traces of life on Earth.The variation in crystallinity of this oldest graphitic carbon could possibly confirm the effect of metamorphism on original biomass, but this is still unexplored.
Thermohaline staircases are stepped structures of alternating thick mixed layers and thin high-gradient interfaces.These structures can be up to several tens of metres thick and are associated with double-diffusive mixing.Thermohaline staircases occur across broad swathes of the Arctic and tropical and subtropical oceans and can increase rates of d
Chinese fir (Cunninghamia lanceolate (Lamb.) Hook) individual tree parameters extraction is important for scientific forest management.However, high-precision parameters extraction by field investigation or spaceborne Magnetic Earpiece optical remote sensing is difficult when the forest is dense and the terrain is complex.This article proposes a fr