How should similarity of mineral deposits be interpreted in Wegener's theory?
Mineral deposits can support old relations between separated lands. Exam tip: treat it as supporting geological evidence.
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SubjectsGeography
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Mineral deposits can support old relations between separated lands. Exam tip: treat it as supporting geological evidence.
View question detailsPole-fleeing force was proposed for equatorward movement linked with Earth's rotation. Exam tip: treat it as a proposed force.
View question detailsThe actual magnitude of tidal force was considered weak for huge continental drift. Exam tip: write weakness of driving force.
View question detailsCoast rock fossil and climate evidences were strong but explanation of forces was weak. Exam tip: separate evidence and mechanism.
View question detailsContinents ploughing through a rigid oceanic base was considered scientifically weak. Exam tip: write it as mechanical criticism.
View question detailsSial was considered lighter continental material and sima a heavier base. Exam tip: understand the older crustal idea.
View question detailsAfter Pangaea broke landmasses separated and oceanic areas formed between them. Exam tip: understand breakup and drift together.
View question detailsGondwana-related rocks and fossils in India show relation with the old southern landmass. Exam tip: place India in the Gondwana group.
View question detailsPalaeoclimatic evidence can show a past position different from the present. Exam tip: do not judge the past only by present climate.
View question detailsWhen multiple independent evidences support one conclusion it becomes more reliable. Exam tip: write combined evidence.
View question detailsWegener linked similar fossils and rocks with continental movement. Exam tip: understand the difference between land bridges and drift.
View question detailsConvection current suggested movement due to Earth's internal heat. Exam tip: connect Holmes with mechanism improvement.
View question detailsSeafloor spreading strengthened the idea of a dynamic Earth. Exam tip: write it as later support.
View question detailsThe correct answer is option A. The governing concept is the historical development of the continental-drift and plate-tectonic theories. Alfred Wegener proposed continental drift in 1912 and supported it with evidence such as the jigsaw fit of continents, matching fossils, continuity of rocks and related past climates. Seafloor spreading was not one of his original evidences because the ocean-floor mechanism and supporting magnetic data were developed and accepted later, especially through work by Harry Hess and subsequent oceanographic research. Options B, C and D either name unrelated processes or confuse a fossil clue with a later mechanism.
View question detailsPalaeomagnetism was an important evidence developed after Wegener. Exam tip: identify it as modern support.
View question detailsWegener gave a conceptual base for later plate tectonics by treating continents as mobile. Exam tip: connect contribution with later development.
View question detailsIn plate tectonics ocean floors and continents are parts of plates. Exam tip: maintain the difference between continent and plate.
View question detailsScientific evaluation includes both contribution and weakness. Exam tip: write a balanced answer.
View question detailsLaurasia was the northern part and Gondwanaland the southern part. Exam tip: remember the direction-based division.
View question detailsUnderstand Pangaea as united land and Panthalassa as vast ocean. Exam tip: do not reverse the two.
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