Detroit Seamount
One of the oldest volcanoes of the Hawaiian-Emperor seamount chain, near its northern end south of the Aleutians: lava flows drilled from it at Site 1203 are 75.8 million years old. Drilled in 2001, it became evidence in the still open debate over whether the Hawaiian hotspot stood still or moved.
Dated events and their evidence
- about 75,800,000 years ago mainstream
lava flows drilled on Detroit Seamount at ODP Site 1203 give a mean argon-argon age of 75.8 million years, plus or minus 0.6 million source - 1963 CE mainstream
the geologist J. Tuzo Wilson proposes that the Hawaiian-Emperor chain was built by a stationary hotspot over which the Pacific plate drifted north-west source - 2001 CE mainstream
Ocean Drilling Program Leg 197: in two months aboard the JOIDES Resolution, scientists core lava flows from four submerged volcanoes; Detroit is drilled twice, at Sites 1203 and 1204 source - 2003 CE disputed
Tarduno and colleagues read the magnetism of the drilled lavas as evidence that the hotspot itself moved fast, over 40 mm a year, from 81 to 47 million years ago, and so shaped the Emperor chain; the cause of the chain's bend is still debated source - 2006 CE disputed
Sharp and Clague date the start of the bend near Kimmei Seamount to about 50 million years ago and attribute it to a change in Pacific plate motion; the cause of the bend is still debated source
Where
51.4800° N, 167.6000° E
The point is Wikipedia's position for Detroit Seamount, 51 28.80 N, 167 36 E, near the northern end of the Hawaiian-Emperor chain south of the Aleutian Islands.
Sources
- https://en.wikipedia.org/wiki/Detroit_Seamount
- https://en.wikipedia.org/wiki/Hawaiian%E2%80%93Emperor_seamount_chain
- https://doi.org/10.1029/2004GC000704
- https://doi.org/10.1126/science.1086442
- https://doi.org/10.1126/science.1128489
Each event carries Aion's own evidence grade (mainstream, disputed or speculative). This page repeats what the globe shows for this place.