The KT Boundary (also called the Cretaceous-Paleogene, or K-Pg boundary) is a boundary marking the Cretaceous-Tertiary extinction (KT extinction) event. It is usually seen as a thin band, caused by an asteroid impact that wiped out much of life at the time.
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The K-T boundary, also known as the Cretaceous–Paleogene boundary, is a geological boundary marking the end of the Cretaceous period and the beginning of the Paleogene period. It is marked by a mass extinction event that wiped out non-avian dinosaurs and many other species around 66 million years ago. The impact of an asteroid or comet is believed to have played a significant role in this mass extinction event.
The K-T boundary is the distinct line that can be drawn around the world in the sediment that marks the time of the impact of a meteorite that caused mass extinction on Earth. It is characterized by a high Iridium concentration.
Researchers have found evidence of the KT boundary in Colorado, including a layer of sediment containing high levels of iridium, shocked quartz, and microtektites. These materials are characteristic of the impact event that caused the mass extinction of the dinosaurs.
In hurricane reports, "kt" stands for knots, a unit of speed used to measure wind intensity. Knots are commonly used in meteorology and maritime fields to estimate the speed of winds.
Convergent boundary.
Mt. Fuji is located in Japan. It is near a continental convergent boundary, a continental transform boundary, and an oceanic transform boundary.
Transform boundary