sphærosiderite Min.
(sfɪərəʊˈsɪdəraɪt)
[f. sphæro- + siderite1.]
‘A variety of siderite occurring in spherical concretions’ (Chester).
| 1837 Dana Min. 213 Carbonate of Iron. Sparry Iron... Sphærosiderite. 1878 Lawrence tr. Cotta's Rocks Class. 50 In the compact state, or when occurring in reniform masses or concretions, this mineral is termed sphærosiderite. 1886 Geikie Class-Bk. Geol. 181 Sphærosiderite or Clay-ironstone concretions enclosing portion of a fern. |