HOT SPOTS

LINEAR VOLCANIC CHAINS THOUGHT TO BE DUE TO PLATE MOTION OVER A FIXED OR SLOWLY MOVING HOTSPOT

PROGRESSION FROM ACTIVE VOLCANISM THAT BUILDS ISLANDS, TO UNDERWATER SEAMOUNTS AS SEAFLOOR MOVES AWAY FROM THE PLUME, COOLS, AND SUBSIDES.

FOR THE HAWAIIAN-EMPEROR CHAIN, AGES OF VOLCANISM RANGE FROM PRESENT, ON ACTIVE BIG ISLAND OF HAWAII, TO A FEW Myr ON OTHER HAWAIIAN ISLANDS

AGE PROGRESSION RECOGNIZED BY NATIVE HAWAIIANS, WHO ATTRIBUTED IT TO ORDER IN WHICH THE VOLCANO GODDESS PELE PLUCKED THE ISLANDS FROM THE SEA.

AGE ~ 28 MYr AT MIDWAY ISLAND, AND 70 MYr WHERE CHAIN SUBDUCTS INTO ALEUTIAN TRENCH

BEND IN CHAIN WOULD REFLECT CHANGE IN PLATE MOTION

 

IDEA IS ATTRACTIVE - EXPLAINS MIDPLATE VOLCANOES - BUT CONTROVERSIAL SINCE DATA DON'T MATCH SOME PREDICTIONS