The Lost City, Oklahoma, meteorite: An introduction to its laboratory investigation and comparisons with Příbram and Ucera

The first stone to be recovered from the Lost City, Oklahoma, meteorite shower of January 3, 1970, was a 9.8-kg individual. It arrived in our laboratory on January 10, 1970, for preliminary examination and distribution to others for study. Later a 6.6-kg specimen was purchased, and a 272-gram and a 640-gram specimen were lent to us for examination. The 9.8-kg aerodynamically shaped individual and the 6.6-kg and 272-gram specimens can be fitted together on the basis of morphology. Mineralogical and chemical investigations were undertaken on the Lost City meteorite as well as the Příbram, Czechoslovakia, fall of April 7, 1959, and the Ucera, Venezuela, fall of January 16, 1970. All three meteorites are olivine-bronzite chondrites, type H5 of the Van Schmus and Wood classification, and are similar in composition and mineralogy. The three meteorites can be distinguished on the basis of petrologic characteristics that apparently relate to their shock histories.