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Akilia Island "Oldest Known Sedimentary Rocks on Earth"
Akilia Island is home to the oldest known sedimentary rocks on Earth. This metamorphosed supracrustal sequence has been dated to be at least 3.85 billion years old, which places its age in the Hadean eon. The age is based on the igneous rocks that transverse the sequence.
The Akilia Island sedimentary rocks are rich in iron and silica, which have left scientists to conjecture as to it being true banded iron or of submarine hydrothermal vent origin. The element carbon is present in these rocks as graphite. The conditions are appropriate for the Akilia Island supracrustal sequence to contain, to date, possibly the oldest known life on Earth.
The Hadean earth contained hellish conditions from at least 4.6 billion years ago (approximate date of earth's origin) until about 4 BYA. Early bombardment from asteroids, meteorites and comets, along with residual high heat from its accretion are just the short list of what the conditions were like, from the outset. Precious few Hadean rocks have been left since geologic "Deep Time" for us to examine for traces of early biological life.
Specimen size: 43mm L X 21mm W X 11mm D
This specimen ships with information, Certificate of Authenticity, tag stand and perky display case.
Photo cube and acrylic base not included.
Obtained in a materials trade with a scientific institution. Only 1.
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