The Dimmitt meteorite hit Earth in pre-historic times, and was found in Castro County, Texas in 1942. Some of the nicks are from the farming plough.
Chemical analysis from a sample (see photo below) resulted in a classification as an H3.7 chondrite, but H5 & LL clasts have also been found within the breccia (a mix of different rock types), plus extremely fine grained interstellar diamonds. This find is all the more important because it is an unequillibrated, gas-bearing regolith breccia from the surface of an asteroid.
The 8389 painted on was from the University of Arizona and the 41 from Hawley, who studied platinum in meteorites. This is a 489g individual.
• H group: The high-iron (H) chemical group of ordinary chondrites. 25% iron in this case.
• H3.7: the the constituent minerals have not been altered very much since formation in space.
It has been the subject of study:
• Nature of the H chondrite parent body regolith: Evidence from the Dimmitt breccia, by A.E. Rubin, E.R.D. Scott, G.J. Taylor, K. Keil, J.S.B. Allen, T.K. Mayeda, R.N. Clayton, and D.D. Bogard (1983)
• Structure and fragmentation of the parent asteroids of ordinary chondrites, by G.J. Taylor, E.R.D. Scott, A.E. Rubin, P. Maggiore, and K. Keil (1982).
