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3 days ago · The Shergotty meteorite, a 4 kilograms (8.8 lb) Martian meteorite, fell on Earth on Shergotty, India on August 25, 1865, and was retrieved by witnesses almost immediately. It is composed mostly of pyroxene and thought to have undergone preterrestrial aqueous alteration for several centuries. Certain features in its interior suggest remnants of ...
3 days ago · Observations of the Martian upper atmosphere, measurements of isotopic composition and analyses of Martian meteorites, provide evidence of the long-term changes of the atmosphere and constraints for the relative importance of different processes.
May 23, 2024 · However, chemical analysis of Martian meteorite samples suggests that the ambient near-surface temperature of Mars has most likely been below 0 °C (32 °F) for the last four billion years. Some scientists maintain that the great mass of the Tharsis volcanoes has had a major influence on Mars' climate.
May 6, 2024 · Martian Chronicles. We have defined three types of Martian meteorites: Shergottite (igneous rocks named for an 1865 meteor that fell in Shergotty, India), nakhlits (igneous rocks rich in augite from El-Nakhla, Egypt, and chassignite (after an 1815 meteor in Chassigny, France).
May 7, 2024 · We are testing this hypothesis with the early Mars Global Climate Model (eMGCM), a version of the MGCM with special physical treatments for ancient Mars that utilizes the legacy Arakawa c-grid dynamical core. Simulations include impacts of various diameters (30 km, 50 km, and 100km) and different surface pressure scenarios (150 mbar, 1 bar, and ...
May 23, 2024 · Writeup from MB 109: Northwest Africa 13581 (NWA 13581) Algeria. Purchased: Dec. 2018. Classification: Martian meteorite (shergottite) History: Purchased by Bo Zhang in Dec. 2018 from an anonymous dealer. Physical characteristics: A single cone-shaped stone with fresh fusion crust and flowlines. Petrography: The specimen is medium- to coarse ...
May 23, 2024 · Northwest Africa 8159. This is an OFFICIAL meteorite name. This is the only approved meteorite classified as Martian (augite basalt). History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to his partner Sean Tutorow for classification in 2013. Physical characteristics: Single stone, weathered exterior with yellow-brown patina ...
