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Blocks weighing up to 1,000 tonnes were hurled 100 m (330 feet).However, the most violent explosions occurred on 19 February 1975, accompanied by what eye-witnesses described as atmospheric shock waves.9 Blocks up to 30 m (100 ft) across were catapulted up to 3 km (almost 2 miles). Turbulent avalanches of ash and blocks swept down Ngauruhoe’s sides at about 60 km (35 miles) per hour.10 It is estimated that at least 3.4 million cubic metres (120 million cubic feet) of ash and blocks were ejected in 7 hours.11up If any of these assumptions are violated, then the technique fails and any “dates” are false.Yet they yield “ages” up to 3.5 million years which are thus false.How can we trust the use of this same “dating” on rocks whose ages we don’t know?Argon gas, brought up from deep inside the earth within the molten rock, was already present in the lavas when they cooled.

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.This decay process leads to a more balanced nucleus and when the number of protons and neutrons balance, the atom becomes stable.This radioactivity can be used for dating, since a radioactive 'parent' element decays into a stable 'daughter' element at a constant rate.Mt Ngauruhoe is thought to have been active for at least 2,500 years, with more than 70 eruptive periods since 1839, when European settlers first recorded a steam eruption.2 Of course, before that, the Maoris witnessed many eruptions from the mountain.The first lava eruption seen by Europeans occurred in 1870.3 Then there were ash eruptions every few years until a major explosive eruption in April–May 1948, followed by lava flowing down the northwestern slopes in February 1949.4 These flows are still distinguishable today on the northwestern and western slopes of Ngauruhoe (Figure 4).Radioactive decay is a natural process and comes from the atomic nucleus becoming unstable and releasing bits and pieces.These are released as radioactive particles (there are many types).If the method fails on rocks when we have an independent eye-witness account, then why should we trust it on other rocks where there are no independent historical cross-checks?However, we do know Someone who was present when all the earth’s rocks formed—the Creator Himself.The 18 August flow was more than 18 m (55 feet) thick and still warm almost a year after congealing.Explosions of ash completed this long eruptive period.

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  1. Jun 13, 2001. Dating rocks by these radioactive timekeepers is simple in theory, but the. minerals, the half-life of its radioactive isotope potassium-40 is such.

  2. This page contains a short explanation of radiocarbon dating and potassium-argon dating.

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