| 词汇 | 地层 |
| 释义 | 地层 But the team concluded that those anomalies were created by jumbling of strata when debris flowed back into the crater after the impact. Dr Bucher, however, has had the benefit of looking at a set of strata in southern China that were, until recently, off limits to foreign scientists. As the plates diverge from a mid- ocean ridge they slide on a more yielding layer at the base of the lithosphere. The rock record of the present doesn't exist yet, of course. So the question was: When it does, will human impacts show up as “ stratigraphically significant”? Then-16-year-old Lyson was fossil- hunting in1999 in the Hell Creek Formation badlands of North Dakota when he first spotted the dinosaur's bone-like protrusion from a hill. Low-speed collisions have also been proposed to explain some comets' layered structures. The uncanny tufa formations take on a golden appearance at sunset. Mono Lake's tall grasses and shrubbery are shown growing along the bottom of this tufa formation. He carried that impression with him for fourteen years, until he went to study at CalArts and produced his final project film, Buzz Box, in the technique he named Strata Cut. The older strata gradually disintegrated. Lava strata are most easily seen at the Grand Canyon of the Yellowstone, where the Yellowstone River continues to carve into the ancient lava flows. To view the maps and various information layers provided, visit the viewer online. As he explains, the Geologic Time Scale is largely based on the stratigraphic record. New sources of natural gas from unconventional formations have added supplies in North America equivalent to about a century's worth of use, he said. It could also hover down a cliff face to examine geological strata. To avoid contamination, wells in the Bengal Basin can be drilled into deep layers that were oxidized during the last ice age, in which the water is free of arsenic, Berg says. The term has slowly picked up steam, both within the sciencesthe International Commission on Stratigraphy, ultimate adjudicator of the geological time scale, is taking a formal interest and beyond. The group is the first to give real-life evidence that arsenic in deeper layers can get into groundwater. It cuts a clean cylinder of rock, from which can be seen the strata the drill has been cutting through. A sunset casts a warm glow over the tufa formations as seagulls forage for dinner. The remote Kimberley region in Western Australia features dramatic landscapes filled with river gorges and sandstone formations that were featured in the2008 film Australia. Taking the abstraction of geological strata as a starting point, early models had, describes Kim, “a layered or stratified stone ground plane that stepped down with the sloe of the canal.” |
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