Earth's craters reveal the history of the Earth

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Sara Masrii, University of Toronto

EarthSky lunar calendars are cool! They give them great prizes. Command now. Faster going!

Most scientists believe that the rate of mortality consumed by molten mercury and moon over the last two to three million years has continued to remain steady. Understanding the age of craters on the Moon will help us to understand the age of our own planet, because the Earth would have a similar collision.

Earth craters (300-600 million years ago) are rarely assumed to be sustainable. The years have passed since the volcano eruptions and movements of earth. Since then, my colleagues and I spent 300-600 million years using the new method of craters on the Moon [old] Because of the low bombing rate. In fact, the blast has increased by two to three million over the past 300 million years.

In an article published in astronomy, we have compared the Earth's craters to the Moon's subdivisions to examine this idea Science. The scarcity of craters between 300 to 650 million years old is not due to protection from the impact of the bombing at that time.

Dating craters

The Moon's surface time serves as capsule, helping us to distort the history of the Earth. There are tens of thousands of craters on the Moon. The only way to see whether the bombardment has changed is a period of time for each crater.

Traditionally, data craters are red sandstones, inhalation – removed from the impact of each crater. However, these methods make the quality and availability of the image too long and limiting.

In our work, we use a new method to determine age barrier craters, using temperature data from the Lunar Reconnaissance Orbiter Divider Device. This innovative method is the trend of cratering craters that define the age limit for Copernic craters (one billion young people).

Large lunar rocks are warm at night because of high temperature. But this method is assumed that the sand particles will quickly lose the so-called regolite heat.

There is a simple similarity to the concept of pillars. Big rocks and sand are hot during the day. However, soon after the sun sets, the sand is cool. Large rocks with high thermal environments are hotter, more time-consuming.

Stable landscape and crust and soil erosion

Small craters have been discovered to detect uncontrolled fragments from volcanoes. Eventually, these giant rocks will be destroyed as a result of a small impact on the future. Finally, millions of years later, all the rocks form the lunar roots (a good layer of dust on the Moon's surface). An inverse relationship between the rock's abundance (the rock on the crust of the crater) and the age of the crater. When the hiatus becomes old, they become rocks.

With a measured rock rich value, in the last billion years, there are six diameter (10 km) in diameter at 111 square feet in diameter between 80 ° and 80 ° C. Through the period of craters, the major lunar craters production rate – tripled with a diameter of 10 miles (10 km) – tripled to 300 million years ago. The majority of the earth has been growing over the past billion years.

In the last 650 million years, there are sizes and shapes of lunar and continental mammals of 12 mile (20 km) in size. This suggests that large impact craters must be limited to a constant grass surface. The observation of large terrestrial craters is not the scarcity scarcity of 290-650 million years, but also a low impact. If we have been tracked in more grounded soils, the age distribution of underground craters would have been strongly curved against young people.

Using data from recent studies of the lunar researchers, system sounds have created this video and created with soundtrack.

The support of limited soil erosion in the irrigation zones of the earth's timetable pipeline documents is supported. Kimberlite pipes are carrot-shaped pipes that stretch kilometer below the surface, and are often found in stable areas where tropical craters are found. These underground pipes are widely excavated for diamonds. Scientists give a lot of information about their position and soil erosion states.

Documents indicate that Kimberlite Pipes have not experienced a lot of damage before 650 million years ago. Therefore, the larger young meteorite found in the same standard landscapes would have been a sugary and must give us a complete record.

Asteroid splitting?

The cause of this increase in occupation is unknown. However, an asteroid asteroid is a large quantity of remnants that leave the asteroid and move into our solar system. Snowball Earth is one of the worst craters since 650 million years ago. Most of the earth's surface was frozen 650 million years ago.

We predict that Chiksu Lub, a rare endangered threatening crater, was a product of the present high bombshell rate, which could trigger the extinction of the dinosaurs. These new findings may apply to the evolution of phanerozoic life – our current underground era – the history of life, including the evolution and evolution of new species.

A planetary scientist explains what planet Earth can be used to describe Earth's craters.

Sara Masrii, Zenith Lecturer and Planetary Scientist, Tarna University

This article has been republished Conversation Under a Creative Commons license. Read the original article.