varves sentence in Hindi
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- De Geer's Swedish Time Scale underwent the first of many revisions, as other geologists became involved in the study of varves and more sites were examined.
- The bitter dispute between De Geer and Antevs, coupled with the advent of new dating techniques, most importantly radiocarbon dating, showed varves in a bad light.
- Some observations of varves ( layers seen in the mud covering the bottom of lakes ) matched the prediction of a Milankovitch cycle lasting about 21, 000 years.
- Paleoclimatology dates back to the 19th century, and the concept of examining varves in lake beds and tree rings to track local climatic changes was suggested in the 1930s.
- As a consequence, the sediments at the bottom of Lower Mystic Lake accumulate in annual layers ( or varves ) that have been nearly undisturbed for a thousand years.
- As the varves get closer to the shoreline the clay layer will stay relatively the same thickness, but there will be an increase in thickness of the silt layer.
- As a result, the mud at the bottom of the lake is made of alternating black and white layers ( or varves ) representing different seasons of the year.
- "' Parting-step lineation "', which is characterized by step-like parting surfaces, has been reported by Banerjee from varves deposited in glacial lakes.
- Till is deposited at the terminal moraine, along the sandurs by the rivers flowing from the glacier, and as varves ( annual layers ) in any proglacial lakes which may form.
- It experienced annual layering of sediments, or varves : silt and sand in the summertime ( due to glacial meltwater ) and clay in the wintertime ( as the lake froze ).
- The lake contained muddy water, and the sediment of Lake Vermont contains silt / clay varves, with silt being deposited during summer and clay during the less-energetic flow of winter.
- But like with the varves, although the Jehovah's Witnesses I talked to had no explanation for the geographical isolation of the Australidelphia, that didn't actually affect their beliefs.
- Turbidites from lakes and fjords are also important as they can provide chronologic evidence of the frequency of landslides and the earthquakes that presumably formed them, by dating using radiocarbon or varves above and below the turbidite.
- Unlike dating based on radioactive decay, varves provide a very direct, very simple to understand measure of the geological passage of time, even to people with a very weak understanding of any branch of science.
- De Geer called these annual sedimentary layers varves and throughout the 1880s further developed his theory, publishing a brief outline of his discovery in 1882, which he followed with a presentation to the Swedish Geological Society in 1884.
- Crawford Lake is meromictic, which means it has sequentially-deposited seasonal sediment laminations called varves at the bottom; these allow for accurate dating of sediment cores and make Crawford Lake a prime site for archeological and geochemical studies.
- Wilmot H . Bradley showed that annual varves in lake beds showed climate cycles, and A . E . Douglass found that tree rings could track past climatic changes but these were thought to only show random variations in the local region.
- Paleoclimatology dates back to the 19th century, and the concept of examining varves in lake beds and historical documents and temperature records of central England to propose a Medieval Warm Period from around 900 to 1300, followed by Little Ice Age.
- The wedges may have formed in a relatively short period of time, perhaps no more than a few hundred years, as indicated by the annual deposition cycles in glacial lakes ( known as "'varves "') within the moraine sediments.
- Because of this lack of physical mixing, as well as the absence of growing plants or crawling animals in their oxygen-depleted depths, the deep bottoms of the lakes have relatively undisturbed annual layers of sediment ( or varves ) that preserve a historical record, somewhat like tree rings do.
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