brecciated chondrite | which depends on its composition | in volume % | in weight % | from unshocked to whole rock melted | oldest and most primitive rock in solar system | during meteor phase | in volume % | from unshocked S1 to shock melted | it fragments because smaller pieces with less mass are more easily slowed by the atmosphere | size is between 3 micrometers and 3 millimeters | usually plagioclase tectosilicate | during meteor phase which depends on composition | in weight % | crater | strewn fields, elongated footprints which depends on impact angle, airbursts, and impact velocity | recorded by eyewitness or inferred from dating methods | | shock metamorphism | providing insight into geological evolution of parent asteroid | based on the locale, region, or nearby town in which the fall occurred | orthopyroxene for enstatite chondrite | the nature and degree of thermal metamorphism or aqueous alteration | visual characteristics of single crystals in polarizing microscope | | before, during or after other types of metamorphism | definition goes here | in volume % | | during impact phase | small sphere of about 1 mm diameter of formerly melted minerals | 485755 kg | definition goes here | less than 950 degree Celsius during its entire history since solidification | when it hits the ground which is smaller than its velocity before it enters the atmosphere | visual characteristics of single crystals in polarizing microscope | visual characteristics of single crystals in polarizing microscope | asteroid smaller than 100 km in diameter | fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents | in degrees, minutes and seconds of lattitude and longitude | in volume % | which depends on degree of aqueous alteration and thermal metamorphism | in weight % | often minerals not found on Earth | large if the fall was witnessed | which can over an order of magnitude greater than total mass of fragment(s) collected at the impact site | in weight % | meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal | 1691 | directly proportional to initial velocity | power outages and failures in electrical equipment due to EMP (electromagnetic pulse) | the equilibration peak shock pressure in GPa (gigapascals) for ordinary chondrites only | millimeters | | which appears as an elongated footprint which depends on impact angle, airbursts, and impact velocity |