Beringia’s environment during the late Pleistocene has been characterized as a graminoid and forb-dominated steppe-tundra mosaic generally referred to as the mammoth-steppe31,33,35,46,47,48,49,50. It is thought to have been the most extensive terrestrial biome on Earth during the late Pleisto...
suggesting that some organics are removed from the birnessite during this wash step. However, the persistence of the broad shoulder between 3,000 and 2,800 cm−1after washing in NaOH indicates that not all the C-H bonds are removed, confirming a strong association between this remaining OC...
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I was quickly schooled on the fells in the Lake District National Park, Cumbria. The climbs started at sea level so that equated to straight up to the top to reach each summit. My reality became clear in Cumbria that ‘up is up’ and there was nothing but up to get to the top. My...