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What is the significance of the boundary between the cretaceous-tertiary time periods?
The boundary between the Cretaceous and Tertiary periods, known as the K-T boundary, marks a significant mass extinction event that wiped out the dinosaurs and many other species. It is believed to have been caused by a combination of factors, including a meteor impact and volcanic activity. The extinction event paved the way for the rise of mammals and ultimately led to the diversification of life on Earth.
What is meaning Tertiary Boundary?
A boundary is a borderline, a separation between two things or the edge of something. Tertiary means third. In this case the 'Tertiary Boundary' has a geological meaning. It is an horizon in the Earth's rock sequence that marks the end of the 'Tertiary Period' at the end of the 'Cretaceous' and the begiining of the 'Quaternary Period' - a point in time in Earth's history some 65.5 million years ago. It is also the time when the Dinosaurs became extinct.
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.
Did the K-T extinction occur before or during the Tertiary period?
The Tertiary Period (65.5 to 2.588Ma) is the informal name for the geological period that followed the K-T extinction event. So the K-T event happened before the Tertiary. In fact "K-T" is actually short for Cretaceous-Tertiary as it marked the end of the Cretaceous and the start of the Tertiary.The lower tertiary is more formally known as the Paleogene Period(65.5 - 23.03 Ma) and the upper Tertiary is more formally known as the Neogene Period(23.03 - 2.588Ma).
What era did earth contain a layer of iridium?
The layer of iridium that is found in the Earth's crust is associated with the Cretaceous-Paleogene (K-Pg) boundary, which marks the end of the Mesozoic Era and the beginning of the Cenozoic Era. This layer is often linked to the mass extinction event that led to the extinction of the dinosaurs.
What period did the dinosaurs become extinct?
Around the end of the Cretaceous Period.Dinosaurs became extinct at the end of the Mesozoic Era 65 million years ago. Their extinction also marked the beginning of the Cenozoic Era.Dinosaurs disappeared near the end of the cretaceous period.Most people believe it was at the end of the Cretaceous however the truth is that it ended in the Tertiary PERIOD not era so be careful that was why the event was called the K-T event because c had been taken in a mass extinction in the oceans.All non avian dinosaurs lived in the Mesozoic Era (251 - 65Ma). The mass extinction 65 million years ago of all non avian dinosaurs along with many other types of animals and plants marks the boundary between the Mesozoic and the Cenozoic Eras.
What is the significance of an electronegativity difference of 1.7 between 2?
It represents the boundary between what is considered to be an ionic or a covalent bond.
What is the significance of an electronegative different of 1.7 between 2 atoms?
It represents the boundary between what is considered to be an ionic or a covalent bond.
What is the significance of an electronegative difference of 1.7 between 2 atoms?
It represents the boundary between what is considered to be an ionic or a covalent bond.
What is the significance of an electronegativity different of 1.7 between 2 atoms?
It represents the boundary between what is considered to be an ionic or a covalent bond.
What is the KT boundary asteroid?
It is the asteroid that hit the Earth 65 million years ago and contributed to the extinction of the dinosaurs. It impact crater is located in Chicxulub which is in the Yucatan peninsula, it is buried deep underground. KT refers to the geological transition between the Cretaceous and the Tertiary periods. (Cretaceous in German starts with a K)
What is the KT asteroid?
It is the asteroid that hit the Earth 65 million years ago and contributed to the extinction of the dinosaurs. It impact crater is located in Chicxulub which is in the Yucatan peninsula, it is buried deep underground. KT refers to the geological transition between the Cretaceous and the Tertiary periods. (Cretaceous in German starts with a K)
