. Smithsonian miscellaneous collections. t as it cools below 400°. Dense plessite areas filling the space between the kamacite platesprobably represent the last metal to transform—the residual portionremaining after the kamacite has separated and formed a skeletalmass of plates. The following table gives all the meteorites now known to havebeen discovered in Ohio. Table 4.—Ohio meteorites Name County Kind Latitude Longitude N. W. ?Anderson Hamilton Pallasite 39°io 84°i8 ?Cincinnati Ataxite 39°7 84°2c/ Enon Clark Mesosiderite 39°S4 83°57 Hopewell Mounds Ross Med. octahedrite 39015 83°o ?New Con


. Smithsonian miscellaneous collections. t as it cools below 400°. Dense plessite areas filling the space between the kamacite platesprobably represent the last metal to transform—the residual portionremaining after the kamacite has separated and formed a skeletalmass of plates. The following table gives all the meteorites now known to havebeen discovered in Ohio. Table 4.—Ohio meteorites Name County Kind Latitude Longitude N. W. ?Anderson Hamilton Pallasite 39°io 84°i8 ?Cincinnati Ataxite 39°7 84°2c/ Enon Clark Mesosiderite 39°S4 83°57 Hopewell Mounds Ross Med. octahedrite 39015 83°o ?New Concord Muskingum Stone 40°2 8i°46 ?New Westville Preble Octahedrite 39°48 84°49 Pricetown Highland Chondrite 39011 83°44 ?Wooster Wayne Octahedrite 40°5o 8i°58 * Specimens in the U. S. National Museums collections. 6 Henderson, E. P., Chilean hexahedrites, Amer. Mineral., vol. 26, p. 546, 1941. 7 Perry, S. H., U. S. Nat. Mus. Bull. 184, p. 54, 1944. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 104, NO. 17, PL. 1. New Westville Meteorite i. slice, light macro-etch, ordinary light. 2/5 natural size. 2 at left, two kamacite bands, showing gamma-alpha transformation figures, Miniated by a lamellaof taenite At right, a characteristic light plessite field, consisting of spheroidized taenite particles scat-tered without orientation in a ground of clear kamacite. Near the edges of the held, inside the cleartaenite border, a band of varying width darkened because of incomplete transformation. 1 lcral 30 3, a plessite field showing intergranular invasion of hydroxide. Kamacite areas are, in part, darkened;taenite is not affected. Picral 30 seconds x 50. . , 4. two light plessite fields showing (particularly the upper one) some intergranular invasion othydroxide. Gamma-alpha transformation figures are faintly visible 111 the kamacite bauds, J lcral 30seconds x 50. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 104, NO. 17, PL. 2


Size: 1418px × 1762px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience