Impact crater An approximately circular or polygonal depression formed by the hypervelocity impact of an interplanetary body (asteroid or comet) on a planetary surface. Shock metamorphism Irreversible...Grieve, Richard A. F.University of Western OntarioOsinski, Gordon R....
In the abraded heart of South Africa's Vredefort impact crater lurk striking green-black rocks, some of the only remnants of a magma sea that once filled the gaping crater. (Image credit: NASA) The oldest impact crater on Earth is also the largest. Vredefort crater in South Africa, also...
1. The largest impact crater on Earth, the Vredefort crater in South Africa, is 99 miles (160 km) wide and was likely created about 2 billion years ago, according to NASA's Earth Observatory. The crater has largely eroded, but based on what's left of the rim, scientists have estimated...
修饰名词"impact crater"用形容词,所以用know的形容词known,意为"已知的"。故填known。(2)考查动词时态和语态。句意:陨石坑,顾名思义,是小行星撞击地球等天体时形成的。这里为本句谓语动词,根据从句时态可知,主句时态为一般现在时;主语"an impact crater",为名词单数,和动词form之间存在...
1. Barringer Crater Mouser NerdBot / Flickr Barringer Crater is the best known and best preserved impact crater on Earth. The crater is named after Daniel Barringer who was first to suggest that it was produced by a meteorite impact. The crater is still privately owned by his family and is...
BEIJING, Nov. 23 (Xinhua) -- Chinese scientists have discovered a meteorite crater on a mountain ridge for the first time, according to an article recently published in the academic journal "Matter and Radiation at Extremes." The meteorite craters on Earth are circular depressions formed by the...
The almost 15-million-year-old Nördlinger Ries is an asteroid impact crater filled with lake sediments. Its structure is comparable to the craters currently being explored onMars. In addition to various other deposits on the rim of the basin, the crater fill is mainly formed by stratified cl...
Meteor Crater (Barringer Meteorite Crater) formed 50,000 years ago when an asteroid plunged through the Earth’s atmosphere and crashed into what would become central Arizona. Because of the crater’s young age and the dry climate Meteor Crater is the best preserved impact crater on Earth. No...
For clarity, in Section 2, we discuss what actually constitutes a “meteorite impact crater”, provide an overview of the impact process (Section 4), and outline the criteria that we used and recommend for how impact craters, hypervelocity impact craters, and impact deposits on Earth are ...
Shock metamorphism; diameter impact crater; impact structures; 机译:冲击变质;直径撞击坑;撞击结构; 入库时间 2022-08-18 11:43:00 相似文献 外文文献 中文文献 专利 1. Shock metamorphism and impact melting in small impact craters on Earth: Evidence from Kamil crater, Egypt [J] . Agnese FAZI...