What are the evidences given by Alfred Wegener in favour of Continental Drift theory ? (1) Zig-Saw fit of continents (2) Trans-current faults (3) Fossils in different areas (4) Convection in mantle
(1) and (3)
Alfred Wegener (1912, 1915) argued that all continents were once joined as Pangaea and later drifted apart; his support came from geodetic, geological, palaeontological and palaeoclimatic observations.
The jig-saw fit of the opposite Atlantic coasts (South America and Africa) and the occurrence of identical fossils such as Mesosaurus and Glossopteris on continents now separated by oceans were his central evidences, so (1) and (3) are his.
Trans-current (transform) faults offsetting mid-ocean ridges were recognised by J. T. Wilson in 1965 as part of plate tectonics, and convection currents in the mantle were proposed by Arthur Holmes (1928–29); Wegener himself relied on tidal and pole-fleeing forces, so (2) and (4) are not his evidences.
So only the fit of the continents and the fossil distribution belong to Wegener's list of evidences.
Hence, (1) and (3).
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