Nettet16. nov. 2024 · By Josefina Kelly / November 16, 2024. Answer and Explanation: The Lunar Highlands are the oldest features of our moon. These highlands are about four billion years old (the moon itself is considered to be about 4.4 billion years old) and were created by a huge crater after the impact of a large object, most likely a meteor, with … NettetThey also are very old, and have been battered by the impacts of many small meteorites for over 3 billion years. Major Lunar Maria Shown here is a map of the major lunar maria. These maria range from over 200 km to about 1200 km in size. They are typically about 500 m to 1500 m thick. However, each mare appears to contain many thinner basalt …
Geology of the Moon - Wikipedia
Nettet4. aug. 2024 · A mascon – short for mass concentration – is a subsurface area of greater than average density; regular lunar maria such as the Mare Imbrium and the Mare Serenitatis have well-defined mascons. Grimaldi is very ancient and belongs to the pre-Nectarian period, so that its age cannot be less than 3.9 billion years. NettetLunar maria are not simply large lunar craters. Most craters have raised rims; most maria are bordered partly or wholly by broad zones of downwarping. A satisfactory theory for the origin of maria must provide a genetic link between the origin of the depression and the origin of the material which floors it. This paper advances the concept that ... from 2008 to 2009
What are the lunar maria composed of and how did they form?
The ages of the mare basalts have been determined both by direct radiometric dating and by the technique of crater counting. The radiometric ages range from about 3.16 to 4.2 billion years old (Ga), whereas the youngest ages determined from crater counting are about 1.2 Ga. Nevertheless, the majority of mare … Se mer The lunar maria are large, dark, basaltic plains on Earth's Moon, formed by ancient asteroid impacts on the far side on the Moon that triggered volcanic activity on the opposite (near) side. They were dubbed maria, Se mer Using terrestrial classification schemes, all mare basalts are classified as tholeiitic, but specific subclassifications have been invented to further describe the population of lunar basalts. Mare … Se mer • Paul D. Spudis, The Once and Future Moon, Smithsonian Institution Press, 1996, ISBN 1-56098-634-4. • G. Jeffrey Taylor (April 30, 2006). "Finding Basalt Chips from Distant Maria" Se mer There are many common misconceptions concerning the spatial distribution of mare basalts. 1. Since … Se mer • Solar System portal • Apollo 11 landing site • Volcanism on the Moon • List of maria on the Moon Se mer • Google Moon • Lunar and Planetary Institute: Exploring the Moon • Lunar and Planetary Institute: Lunar Atlases Se mer NettetThey range in age from about 3.16 billion years old for the basaltic samples derived from the lunar maria, up to about 4.44 billion years old for rocks derived from the highlands. … Nettet21. feb. 2012 · [3] Stöffler and Ryder carefully reviewed the radiometric and exposure ages determined from returned samples; that is, they revisited the x axis of the lunar cratering chronology. Here, using images from the Lunar Reconnaissance Orbiter (LRO) Narrow Angle Cameras (NAC; 0.5 to 2.0 m/pixel) and Wide-angle Camera (WAC; ≤100 m/pixel) … from 200 g of co2 10 21 molecules are removed