The theory of continental drift by Alfred Wegener states that all land masses were originally united
in a single supercontinent known as Pangaea (250 million years ago). He shows
evidences like continental fit, similarity of rock sequences, glacial till and
striations, fossils (cynogathus-land reptile, lystrosaurus-land reptile,
mesosaraus-freshwater reptile, glossopteris-fern plant) to support his theory but
what was lacking is that it lacked a mechanism to explain HOW the continents
moved apart. But Harry Hess, a geologist and Navy submarine commander during
WWII <span>brought up a new
evidence to add in support of Wegener’s theory: the idea of seafloor spreading and magnetic reversals.</span>
Answer:
Karst topography is formed from soluble rocks with many features that create crevices that channel or funnel the surface water into the ground and aquifers below. This can lead to contamination of the water quality in aquifers.
Explanation:
Karst topography refers to the topography formed from soluble rocks such as limestone, dolomite, and gypsum. The topography evolves as the soluble rocks are exposed to wind, sun, and precipitation that erodes the rock materials and creates crevices and the groundwater is channeled away from the surface, inhibiting the formation of lakes and reserves of water at the surface. When these sorts of rocks begin to dissolve caves and crevices and other forms of underground drainage. Five topographic features a geologist might find are solutions flutes and limestone pavement, cenotes, funnel-shaped sinkholes, and reappearing streams.
The surface hazards associated with karst topography are sinkholes as well as other topographic hazards such as subsidence and slope movements. There is a lot of surface water and groundwater interaction in a landscape with karst typography and so aquifers are susceptible to contamination from pollution and the use of fertilizers and chemicals at a higher rate than other topographies. Urban areas and areas where there is a lot of animal husbandry are especially vulnerable to aquifer contamination.
Answer:
thrust or reverse as its in a compressional setting and you know that because of the folding.
Explanation:
- A thrust fault is breaking of the earth's crust where the older rocks are pushed over the younger rocks and have an inclination of 45° or less. Creating a displacement of the overlying blocks, they can be blind thrust, fault bend faults, and fault duplex.
- These thrust faults occur in areas foreland basins and compression does not result in the process of mountain building as mostly the folding and stacking of the thrusts.
The correct answer for this question is this one: " North America "<span>The cartogram displays the projected world population in 2030. According to the cartogram, the continent that is predicted to have the largest population is North America. </span>Hope this helps answer your question and have a nice day ahead.
