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Geological History Can: Some coastlines have a special character related to the geological history can structure of the coast. The two main kinds of coastlines in this category are concordant or longitudinal coastlines and discordant or transverse coastlines. A concordant coastline occurs in Yugoslavia along the Adriatic Sea, where the geological history can structures parallel the coast. Following submergence, the sea has occupied former valleys while former mountain ranges have become offshore islands. Discordant coastlines occur where the coast cuts across the direction of the geological history can structures, as in the ria coastline of southwest Ireland.
The fossils of organisms that flourished only in specific environmental conditions are an important means of identifying palaeocli-mates, but more direct indicators of climate can also be found. These include such features as ice-grooves in erosion surfaces and rain pits in sandstone, each telling their own story of the geological history can history of the earth.
Historically there were earlier concepts that were used as tools in geological history can thought - for example, neptunism, plutonism, catastrophism and uniformitarianism. Of these, only the last two have survived as useful ideas. Catastrophism arose from the observation that at particular times in earth's history dramatic changes have occurred. They are largely unexplained in origin, but have given rise to interesting speculations. |
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