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568 items
Meteorite "Sierra Madera"
Origin: Sierra Madera, TX
Sample Weight: 775.1 g
Type: Shattercones
From an ancient impact structure dating back at least 225 mil. years. Crater is 13 km in diameter with 5 km abrupt center uplift with height of 1200 m. Sample is piece of dolomite with centimeter sized shattercones on one side.
Acquired from Tiara Observatory
Meteorite "Gretna"
Origin: Gretna, IA
Sample Weight: 979.5 g
Total Weight: 58.7 kg
L5 olivine-hypersthene chondrite. Original red-brown fusion crust shows on one surface. Grains of metal are in pure metal phase and are Ni-Fe grains interspersed with some grains of a bronze color that are FeS (Triolite).
Acquired from H.H. Nininger
Meteorite "Charlevoix"
Origin: Charlevoix, Quebec
Catalog Number: C16
Sample Weight: 524.3 g
Not a meteorite, but a rock showing shattercone structure, which is evidence of a giant meteorite impact. Crater is 35 miles in diameter and is estimated to be 325 mil. years old. No meteorite fragments have been found.
Acquired from Tiara Observatory
Meteorite "Owasco"
Origin: Owasco, NE
Catalog Number: H441.29
Sample Weight: 531.6 g
Type: Aerolite
Complete slice from an individual with some fusion crust showing. Surface has been polished to reveal the chondrules structure on its surface and the pattern of Ni-Fe grains and Fe-S grains (brassy color).
Acquired from Tiara Observatory
