polymict ureilite | low | | olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite) | during meteor phase | it fragments because smaller pieces with less mass are more easily slowed by the atmosphere | no chondrules | size is between 3 micrometers and 3 millimeters | high because it is more friable than iron meteorite | crater | strewn fields, elongated footprints which depends on impact angle, airbursts, and impact velocity | reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal | recorded by eyewitness or inferred from dating methods | | partial melting residue | cooling in deep underground chambers | based on the locale, region, or nearby town in which the fall occurred | | AURE | 7.1 % of meteorite falls | during impact phase | | 9 kg (out of date) | bre - chia | when it hits the ground which is smaller than its velocity before it enters the atmosphere | smaller mineral fragments, carbon, suessite (Fe3Si), sulfides, minor chromite and minor apatite | in degrees, minutes and seconds of lattitude and longitude | olivine-pigeonite about 90% by volume | silicates (with very few exceptions) | which can over an order of magnitude greater than total mass of fragment(s) collected at the impact site | large if the fall was witnessed | polymict breccia | | 6 (out of date) | asteroid | high because it is more friable than iron meteorite | power outages and failures in electrical equipment due to EMP (electromagnetic pulse) | very slow | common in clasts | typical monomict ureilite material plus a variety of other lithic clasts | fragmental breccias containing lithic clasts of typical monomict ureilite material plus a variety of other lithic clasts | | which appears as an elongated footprint which depends on impact angle, airbursts, and impact velocity | coarse-grained granular |