Copyright by Creation Science Foundation, Ltd. All Rights Reserved. The conventional K-Ar dating method was applied to the dacite flow from the new lava dome at Mount St. Helens, Washington. Porphyritic dacite which solidified on the surface of the lava dome in gives a whole rock K-Ar 'age' of 0.
Excess Argon within Mineral Concentrates from the New Dacite Lava Dome at Mount St. Helens Volcano
30 Years Later, the Lessons from Mount St. Helens | The Institute for Creation Research
In the past two months or so the dome-shaped formation of rock in the crater has been developing a large bulge, and frequent plumes of gas have been seen rising from the crater. These are clear signs of volcanic activity and they are very similar to what was seen before the eruptions of Latest reports tell of a steam plume rising passively and drifting south and south-westward over the crater rim. The plume occasionally contains minor ash, which falls in the crater and on the southern flank of the volcano, darkening the new snow. Seismic activity remains low compared to that observed earlier, and is consistent with a slow but continuous rise of magma driving up the crater floor and feeding a surface extrusion of lava.
How old is Mount St. Helens?
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 ; Gill but such attempts invariably have fatal flaws see Dalrymple ; York and Dalrymple Other creationists have focused on instances in which radiometric dating seems to yield incorrect results. In most instances, these efforts are flawed because the authors have misunderstood or misrepresented the data they attempt to analyze for example, Woodmorappe ; Morris HM ; Morris JD
The bulk of the pre— edifice of Mount St. Helens above about 1, m or 6, ft was constructed during the Spirit Lake Stage, which includes the most complex part of the eruptive history. Excellent preservation of deposits, and numerous ages from radiocarbon and tree-ring dating, provides considerable detail for this stage. Volcanism was intermittent, with lulls lasting from a few to about years. As in earlier stages, Spirit Lake volcanism erupted mostly dacite , but significant amounts of basalt and andesite were also erupted.