Earthquakes and rising land; two tectonic processes in phase with
equinoctial precession (and ice ages).

For proof, look at Barbados, the easternmost island in the Lesser
Antilles in the Caribbean. Barbados is terraced. From the air, the
terraces look like a huge flight of stairs.

Two theories exist as to what formed the terraces. Each theory
begins with the same premise, that the island periodically rose from
the sea during a major earthquake. Each time it rose, the first theory goes, one reef died and a new one grew at a lower point on the island.
The second theory holds that each terrace was carved from a single large fossil reef. Each time the island rose, wave action sculpted a
new terrace.

In 1965, Professor Robley K. Matthews of Brown University had the
terraces dated. The lowest one dated at 82,000 years old, the second one dated at 103,000, and the top one dated at 122,000. The steps had been sculpted in sync with precession of the equinoxes. (Broecker
et al., 1968)

Other parts of the world also rose in sync with precession. Each terrace on New Guinea's Huon Peninsula, for example, formed when it abruptly rose above sea level during a major earthquake in sync with precession (Bloom, Broecker, Chappell, Matthews, and Mesolella). The Florida Keys also rose in sync with precession (Broecker and Thurber). So did the Bahamas and the Ryukyu Islands. Other rapidly rising reefs have been dated at 66,000 ± 4,000 years, others at 48,000 years—all in sync with equinoctial precession. Even the exposed beds in southern Scandinavia south of Göteburg, which uplifted about 10,000 years ago, rose in sync with precession.

And the pace is picking up. "The rates of modern movements are
significantly greater than the average rates over the past 130 my,"
said Officer and Drake. "These movements may be episodic," said
Officer, "with a cycle as short as 10,000 years." (Tectonics, 1985)

What would make huge chunks of land halfway around the world
from each other rise in phase with equinoctial precession?

Electromagnetic forces—unleashed by magnetic reversals.