What are the three types of crater?
Lunar impact craters come in three basic types: simple craters, complex craters, and basins. Simple craters are what most people think of when they visualize a crater. They tend to be bowl-shaped with rounded or small, flat floors. Simple craters also have smooth rims that lack terraces.
What is the largest type of crater?
The Vredefort crater, with an estimated diameter of 300 kilometres, is the world’s largest known impact structure.
What is a central crater?
A central-peak crater is the most basic form of complex crater. A central peak crater can have a tightly spaced, ring-like arrangement of peaks, thus be a peak ring crater, though the peak is often single. Many central-peak craters have rims that are scalloped, terraced inner walls, and hummocky floors.
What does deep crater mean?
The maximum depth of the crater measured from the deepest point of the pit to the original ground level. Dictionary of Military and Associated Terms.
Which type of crater is Copernicus?
Copernicus is a lunar impact crater located in eastern Oceanus Procellarum. It was named after the astronomer Nicolaus Copernicus. It typifies craters that formed during the Copernican period in that it has a prominent ray system.
Is the Hudson Bay a crater?
Earth bears the scars of twin-asteroid impacts: the Clearwater Lakes near Hudson Bay in Canada, for instance, are really twin craters that formed about 290 million years ago.
Is Hudson Bay a crater?
What is the largest crater on the Moon?
The South Pole–Aitken basin
The South Pole–Aitken basin (SPA Basin, /ˈeɪtkɪn/) is an immense impact crater on the far side of the Moon. At roughly 2,500 km (1,600 mi) in diameter and between 6.2 and 8.2 km (3.9–5.1 mi) deep, it is one of the largest known impact craters in the Solar System.
Is Tycho a simple or complex crater?
The exposed core of uplifted rocks in complex meteorite impact craters. The central peak material typically shows evidence of intense fracturing, faulting, and shock metamorphism. Tycho, a complex lunar crater, is approximately 160 million years old and has a diameter of 85 km (image courtesy of NASA).
When did Moon get craters?
about 4.5 billion years ago
The detailed analysis of Moon rocks brought back by the Apollo astronauts showed that volcanism and cratering have shaped the Moon’s surface since its formation, about 4.5 billion years ago, shortly after Earth was formed.
What is summit crater?
Summit craters are where volcanic material is at or near the Earth’s surface. Volcanoes may have one summit crater, such as Mount Fuji in Japan.