[(1) It was realized by Hilgenberg, Carey and others that the continents can form a completely interlocking cover over the whole globe if the early radius of the Earth was 50-60 per cent of the present radius]

Umm what does Australia lock into?

2) While evidence for seafloor spreading is definite and measurable, the compensating process of subduction in the plate tectonics theory is largely conjectural. There is no 'smoking gun' of subduction.
]

I'm sure the people of such wonderfull places as New Zealand and Chile would feel safer in their homes, by your rebuttal.

There is no doubt early Mars had an atmosphere. But you can not have you cake and eat it by saying Mars expansion caused the air to thin. Why are we not seeing the same phenomena on Earth. Atmospheric pressure has not changed in the five hundred years since it was first measured.

Your falling sea level argument wont hold water either. In no place on Earth is there evidence of exposed ocean floor. Only shallow sea area, such as central Australia are exposed.

Consenus about Mars is the planet has actually slightly shrunk since formation. With the exception of the Thalis bulge - home of the great volcanoes - most of the major valleys have been created by the planets crust wrinkling as time went on.

Tectonic activity never got started on Mars. Olympus Mons and other sites show this without question.