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What era did earth contain a layer of iridium?
In the K-T layer between the Cretaceous and Tertiary eras.
What is the half value layer for iridium?
3 mm
What has to happen before a rock layer can be deposited?
The Rock Layer has to harden first of all before it can be deposited.
The top of a sedimentary layer was deposited before the bottom?
Incorrect. The bottom of a sedimentary layer was deposited before the top. Imagine pouring different colors of sand in a clear vial one layer at a time and alternating colors. The color (or layer) on the bottom of the vial was deposited by you very first and the layer on top was last to be deposited.
Why do Scientists think a Asteroid hit the world 65 million years killed the dinos?
The main evidence is a layer of iridium that is found worldwide. Iridium is an element that is rare on Earth's surface, but is common in asteroids. The iridium layer dates to 65.5 million years ago, and coincides with the extinction of the dinosaurs. Also, geologists have discovered the Chixculub crater, a crater that is buried by sediment but is so large it could only have been created by an asteroid 6 miles across.
What era had a layer of iridium deposited all over Earth?
End of the Mesozoic era
What is the rare element found in the tombstone layer of the earth?
iridium
What era did earth contain a layer of iridium?
In the K-T layer between the Cretaceous and Tertiary eras.
Which fossil might be found in the red sandstone layer if the layer was deposited during the Triassic period?
GUYS THE ANSWER IS DINOSAUR FOOTPRINT NOT FRIKING MAMMALS
What is the half value layer for iridium?
3 mm
What has to happen before a rock layer can be deposited?
The Rock Layer has to harden first of all before it can be deposited.
The top of a sedimentary layer was deposited before the bottom?
Incorrect. The bottom of a sedimentary layer was deposited before the top. Imagine pouring different colors of sand in a clear vial one layer at a time and alternating colors. The color (or layer) on the bottom of the vial was deposited by you very first and the layer on top was last to be deposited.
What is layer of deposited layer of rock and soil?
i think its sediment
What are two ways that a rock layer can cause a gap in geologic record?
When rock layers are eroded or when a sediment is not deposited for a long period of time.
What is the K-t boundary layer?
K-T stands for Cretaceous-tertiary boundary. The K is used instead of a C to help that there is no confusion between the Cretaceous and Carboniferous Periods; as the Carboniferous Period was among one of the first periods. The K-T boundary is marked by the element named Iridium, the K-T boundary contains approximately 31% iridium, this element is rare on Earth, common in space debris, such as asteroids and meteors/meteorites, such as the one believed to have hit the Earth causing the extinction of the dinosaurs. The Cretaceous was the last of the dinosaur bearing periods. The Tertiary period is the period we as humans live in currently.
What proof is there of an asteroid impact around the time that dinosaurs became existant?
Oh, they've found the crater. It's off Yucatan. The previous evidence was the Iridium layer right at the K-T horizon. Iridium is rare on Earth, but somewhat more common in asteroids.
Where is energy stored in glucose?
The energy is stored within the layer of iridium in the lower hemisphere of Antarctica. Oops i mean the lower hemisphere of the anaredia layer of glucose.
