Dinolava Theory Back in Eruption 08/12/2005
Meteor impact or volcanic eruption? Science Now reports that the volcano theory of dinosaur extinction has rejuvenated, challenging the long popularity of the Chicxulub impact hypothesis.
Notwithstanding all the dramatic animations on science documentaries of a cataclysmic meteor wiping out the dinosaurs, the article by Carolyn Gramling states that “Scientists have long wrangled over the cause of the extinctions....” A new French study of magnetic alignments of lavas in the Deccan Traps of India, some of the biggest lava fields in the world, suggests that the cataclysmic eruptions occurred over a much shorter time period than previously believed – 30,000 years instead of millions – short enough, they claim, to affect worldwide climate. Some of the older eruptions may have happened even more rapidly because there is no evidence of weathering between successive layers.
A Dutch proponent of the impact scenario is not convinced, however. He said we don’t know enough about behavior and variability of the Earth’s magnetic field to make strong arguments based on magnetic alignments in rocks. Gramling says, “He also questions whether any known geophysical mechanism could have spewed out so much lava in such a short time.”
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Walt Brown knows of one.
Meteor impact or volcanic eruption? Science Now reports that the volcano theory of dinosaur extinction has rejuvenated, challenging the long popularity of the Chicxulub impact hypothesis.
Notwithstanding all the dramatic animations on science documentaries of a cataclysmic meteor wiping out the dinosaurs, the article by Carolyn Gramling states that “Scientists have long wrangled over the cause of the extinctions....” A new French study of magnetic alignments of lavas in the Deccan Traps of India, some of the biggest lava fields in the world, suggests that the cataclysmic eruptions occurred over a much shorter time period than previously believed – 30,000 years instead of millions – short enough, they claim, to affect worldwide climate. Some of the older eruptions may have happened even more rapidly because there is no evidence of weathering between successive layers.
A Dutch proponent of the impact scenario is not convinced, however. He said we don’t know enough about behavior and variability of the Earth’s magnetic field to make strong arguments based on magnetic alignments in rocks. Gramling says, “He also questions whether any known geophysical mechanism could have spewed out so much lava in such a short time.”
-----------
Walt Brown knows of one.