Mount st helens eruption false dating
Most of the geologic processes that shape our planet, such as the creeping movement of tectonic plates, are often too slow to see on human timescales. Situated on a subduction zone where the Juan de Fuca Plate in the Pacific Ocean descends under the North American Plate, the Cascade Range from British Columbia to northern California is dotted with volcanoes. Helens is the most active volcano of the group, sitting over an area where the Earth’s surface holds in the melted solid rock and pressure builds up.
But every so often, geology produces a moment with in-your-face intensity. Landsats 2, 3, 5, and 7 have captured views of the Mount St.
When magma pulses into a chamber where crystals are already forming, the crystals develop iron-rich cores and magnesium-rich rims.
On the other hand, crystals already stuck inside the magma as it enters a new chamber could cool off, causing exactly the opposite kind of zoning—magnesium-rich cores and iron-rich rims.
Radiometric dating of rocks and minerals using naturally occurring, long-lived radioactive isotopes is troublesome for young-earth creationists because the techniques have provided overwhelming evidence of the antiquity of the earth and life.
Some so-called creation scientists have attempted to show that radiometric dating does not work on theoretical grounds (for example, Arndts and Overn 1981; Gill 1996) but such attempts invariably have fatal flaws (see Dalrymple 1984; York and Dalrymple 2000).
Helens eruption and the recovery of the ecosystem over the past thirty-two years.
In the false-color image above from September 24, 1980, vegetation is red. Helens had a conical, glacier-clad peak similar to the others in the Cascades chain, and the volcano had been inactive since the mid-19th century.
Creationists seem to think that a few examples of incorrect radiometric ages invalidate all of the results of radiometric dating, but such a conclusion is illogical.An enormous debris avalanche—the largest in recorded history—roared over the landscape.With a gigantic hole ripped down the volcano’s side, superheated gases and rock fragments exploded laterally/horizontally instead of vertically, a phenomenon that had not been witnessed or recorded before in the modern world.First, it provides no evidence whatsoever to support their claim that the earth is very young.If the earth were only 6000–10 000 years old, then surely there should be some scientific evidence to confirm that hypothesis; yet the creationists have produced not a shred of it so far.