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At the boundary of the Earth's crust, tectonic plates interact in various ways, leading to geological phenomena. At divergent boundaries, plates move apart, creating new crust as magma rises to the surface. At convergent boundaries, plates collide, resulting in the formation of mountains or subduction zones where one plate is forced beneath another, often causing earthquakes. Transform boundaries involve plates sliding past each other, which can also lead to seismic activity.
What else can I help you with?
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 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 caused the K-T boundary?
The K-T boundary was caused by a massive asteroid impact that occurred approximately 66 million years ago. This impact is believed to have contributed to the mass extinction of the dinosaurs and many other species. The resulting environmental changes, such as dust blocking sunlight and wildfires, had profound effects on global ecosystems.
What biological findings have been reported at the K-T boundary?
At the K-T boundary, a mass extinction event occurred leading to the extinction of dinosaurs and many other species. Fossil records and sedimentary layers show evidence of a sudden increase in iridium levels, suggesting an extraterrestrial impact as the cause. Additionally, there is evidence of widespread wildfires and climate disruption following the impact.
What happens to the abundance of angiosperm and gymnosperm pollen fossils at the K-T boundary?
At the K-T boundary, there is a notable decline in the abundance of gymnosperm pollen fossils, which reflects the significant ecological changes following the mass extinction event that marked the transition from the Cretaceous to the Paleogene period. In contrast, angiosperm pollen fossils show a relative increase in abundance post-boundary, indicating that flowering plants began to diversify and dominate terrestrial ecosystems in the aftermath of the extinction. This shift highlights the resilience and adaptability of angiosperms in recovering from the catastrophic events that affected global biodiversity.
What is found in the K-T boundary?
I think you are referring to the 'iridium spike' - the Yucatan impactor brought to earth a quantity of iridium that was deposited and is detectable at the K-T boundary (the Cretaceous - Tertiary boundary) wherever this is found round the planet.
What is T in the equation G equals H TS?
The temperature in kelvins at which the reaction is happening
What is letters that stand for the organization that conducts research into problems of flight within and bryond earths atmosphere?
it is t t is the letters
How does this principle makes it easier for geologists to understand earths?
I don' t know
How do you scientist know that K-t extinction took place?
1. There is an unusually high concentration of Iridium found at the K-T boundary. Iridium loves to stick to Iron, so the Iridium that would have been on Earth originally is in the Iron core, not in the crust. Therefore, the Iridium must have been introduced by an external source; a meteorite. 2. Shocked Quartz is found at the K-T Boundary all around North America. Shocked Quartz is only produced naturally by bolide impact. Since the K-T meteorite impacted in the Mexican peninsula, it makes sense that the shocked quartz would be found only in relatively close proximity to the impact site. 3. Microtektites, which are normally found at meteorite impact sites, are found at all K-T boundary impact sites. 4. There is a massive impact crater in the Mexican peninsula. 5. In many of the K-T Boundary sections there is a fine layer of ash (disseminated Carbon) from the global wildfires that were caused. 6. There was a fern spike because other flowering plants stopped producing pollen for awhile. 7. Microdiamonds have been detected at K-T Boundary sites, but not above or below.
How much uranium do you have in the earth?
An estimation is 50.106 t in the earth crust and oceans.
When this happens, crust bends downward and sinks under the other because it is?
t
What has the author T Black written?
T. Black has written: 'A simplified form of the auxiliary equation for use in the calculation of turbulent boundary layers'
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 geologic features would you expect to find at a transform fault boundary?
I don´t know
What is the K-T boundary?
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.
How do scientists know dinosaurs existed?
1. There is an unusually high concentration of Iridium found at the K-T boundary. Iridium loves to stick to Iron, so the Iridium that would have been on Earth originally is in the Iron core, not in the crust. Therefore, the Iridium must have been introduced by an external source; a meteorite. 2. Shocked Quartz is found at the K-T Boundary all around North America. Shocked Quartz is only produced naturally by bolide impact. Since the K-T meteorite impacted in the Mexican peninsula, it makes sense that the shocked quartz would be found only in relatively close proximity to the impact site. 3. Microtektites, which are normally found at meteorite impact sites, are found at all K-T boundary impact sites. 4. There is a massive impact crater in the Mexican peninsula. 5. In many of the K-T Boundary sections there is a fine layer of ash (disseminated Carbon) from the global wildfires that were caused. 6. There was a fern spike because other flowering plants stopped producing pollen for awhile. 7. Microdiamonds have been detected at K-T Boundary sites, but not above or below.
