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An entire forest can be wiped out by streams of molten rock.

In some circumstances however, a flow may encase a small amount of plant material before it is entirely incinerated.

Starved of the oxygen required for combustion, these bits of organic material are preserved inside the cooling lava.

When geologists find these artifacts, they can use them to date the lava flows that contain them.

Because argon is a gas, it should escape to the atmosphere due to the intense heat of the lavas. All flows were typically made up of jumbled blocks of congealed lava, resulting in rough, jagged, clinkery surfaces (Figure 8).That is, it assumes that no argon derived by radioactive decay was present initially, but after the lava cooled and solidified, the argon from radioactive decay was unable to escape and started to accumulate.However, it is well-known that if a radiometric “date” contradicts a fossil-derived (evolutionary) age, the date is discarded as erroneous.Cannon-like, highly explosive eruptions in January and March 1974 threw out large quantities of ash as a column into the atmosphere, and as avalanches flowing down the cone’s sides.

Blocks weighing up to 1,000 tonnes were hurled 100 m (330 feet).

Of course, no geologist was present to test this assumption by observing ancient lavas when they cooled, but we can study modern lava flows. The samples were sent progressively in batches to Geochron Laboratories in Cambridge, Boston (USA), for whole-rock potassium-argon (K–Ar) dating—first a piece of one sample from each flow, then a piece of the second sample from each flow after the first set of results was received, and finally, a piece of the third sample from the 30 June 1954 flow.15 To also test the consistency of results within samples, second pieces of two of the 30 June 1954 lava samples were also sent for analysis. No specific location or expected age information was supplied to the laboratory.



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