Lithospheric plates do not have same thickness everywhere because the plates changes its thickness due to intense heat in the Earth's core as these plates move from Earth's crust and upper mantle to a deeper plasticine mantle. The lithospheric plates are thick at high elevated areas and thin at deep oceans.

Does lithospheric plates have the same thickness everywhere?

Each lithospheric plate is composed of a layer of oceanic crust or continental crust superficial to an outer layer of the mantle. Containing both crust and the upper region of the mantle, lithospheric plates are generally considered to be approximately 60 mi (100 km) thick. ... The term "plate" is deceptive.

Are plates all about the same thickness?

Plates are on average 125km thick, reaching maximum thickness below mountain ranges. Oceanic plates (50-100km) are thinner than the continental plates (up to 200km) and even thinner at the ocean ridges where the temperatures are higher.