Age:<100 million years from present
An 14 km crater from the Cretaceous/Tertiary impact event which was first recognized from the shattercone in 1960, by Dr. Robert S. Deitz.
Location: Texas
Marquez
Age: 58 ± 2 million years from present
A 12.7 km impact structure recognized in 1989. Shatter-cone in a sedimentary target rock.
Ashmore
A single individual of 55.4kg was found during deep plowing at a depth of 18 inches, approximately 3 miles NW of Ashmore. Upon visual examination it is so metal rich that is could easily be mistaken as an enstatite chondrite.
Odessa
The Odessa crater field has several craters ravaged by excavating and weathering; the largest is 530 feet.
Plainview
This is a regolith breccia with carbonaceous inclusions. It is 26.8% iron.
Monahans
One mass of 27.9kg was found 7 miles S and 1 mile E of Monahans, A.D.Nininger, Pop. Astron., Northfield, Minnesota, 1939, 47, p.212, M.H.Hey, Cat. Met., 1966, p.312. Description, with analysis, 10.88% Ni, H.H.Nininger, Pop. Astron., Northfield, Minnesota, 1939, 47, p.268 (M.A.7-376). Description and analysis of the iron shale, 4.99% NiO, J.D.Buddhue, Pop. Astron., Northfield, Minnesota, 1939, 47, p.271 (M.A.7-377). Description of structure, H.J.Axon and P.L.Smith, Min. Mag., 1972, 38, p.736. Classification and analysis, 10.6% Ni, 8.9 ppm Ga, 127 ppm Ge, 14 ppm Ir, J.T.Wasson, GCA, 1969, 33, p.859. Nitrogen abundance, E.K.Gibson and C.B.Moore, GCA, 1971, 35, p.877. Coordinates, description, V.F.Buchwald, Handbook of Iron Meteorites, Univ. of California, 1975, p.832. Nitrogen isotopic composition, I.A.Franchi et al., GCA, 1993, 57, p.3105, C.A.Prombo and R.N.Clayton, GCA, 1993, 57, p.3749. Determination of metallographic cooling rate, H.Haack and K.L.Rasmussen, LPSC, 1996, 27, p.477 (abs.); see also, K.L.Rasmussen et al., MAPS, 2001, 36, p.883. Ion probe analysis of carbon and nitrogen distribution in taenite, N.Sugiura, MAPS, 1998, 33, p.393.
Kaufman
One mass of 23kg was found 4 or 5 miles W of Kaufman, Met. Bull., 1957, (5), M.H.Hey, Cat. Met., 1966, p.234. Listed, K.Keil, Fortschr. Min., 1960, 38, p.231. Olivine Fa23, B.Mason, GCA, 1963, 27, p.1011.
Etter
Four individuals and one fragment of total weight 153.3kg were plowed up in a field. The finds were confined to an area of about 0.4 x 1.2 km, Met. Bull. 53, Meteoritics, 1975, 10, p.147. TL data, terrestrial age, D.W.Sears and A.A.Mills, Meteoritics, 1974, 9, p.47. Exposure age based on spallogenic Mn-53 content, P.Englert and W.Herr, GCA, 1978, 42, p.1635. Calculation of atmospheric ablation based on cosmic ray tracks and Ne isotopes, N.Bhandari et al., Nucl. Tracks, 1980, 4, p.213. Al-26 and Mn-53 data, Ne-21 exposure ages, U.Herpers and P.Englert, J. Geophys. Res., 1983, 88 (suppl.), p.B312. Classification and analysis, 20.63% total Fe, olivine Fa25, A.E.Rubin et al., Meteoritics, 1983, 18, p.179. Listed, 256kg known, G.I.Huss, Cat. 2nd Huss Coll. Meteorites, 1986, p.13. Be-10 and Al-26 data, H.Nagai et al., Papers 14th Symp. Ant. Met., NIPR Tokyo, 1989, p.101 (abs.). Oxygen isotopic composition, R.N.Clayton et al., GCA, 1991, 55, p.2317. Petrographic shock classification, D.St
Richland (Fredricksburg)
Part of the 47 kg found at Fredricksburg, texas and paired chemically with the Richland Meteorite, found in 1951 230 miles away. Probably a transported piece.
Glen Rose
A mass of about 24.5lb was recognized as a meteorite in 1936, A.D.Nininger, Pop. Astron., Northfield, Minnesota, 1937, 45, p.449 (M.A.7-62). The locality is near Cleburne, V.F.Buchwald, Handbook of Iron Meteorites, Univ. of California, 1975, p.597, A.L.Graham et al., Cat. Met., 1985, p.152. Classification and analysis, 9.4% Ni, 0.74 ppm Ga, 0.305 ppm Ge, 3.9 ppm Ir, D.J. Malvin et al., GCA, 1984, 48, p.785.