Elorza, J. J., Rodriguez-Lazaro, J. (1984) Late cretaceous quartz geodes after anhydrite from Burgos, Spain. Geological Magazine, 121 (2) 107-113 doi:10.1017/s0016756800028077
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Late cretaceous quartz geodes after anhydrite from Burgos, Spain | ||
| Journal | Geological Magazine | ||
| Authors | Elorza, J. J. | Author | |
| Rodriguez-Lazaro, J. | Author | ||
| Year | 1984 (March) | Volume | 121 |
| Issue | 2 | ||
| Publisher | Cambridge University Press (CUP) | ||
| DOI | doi:10.1017/s0016756800028077Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 252321 | Long-form Identifier | mindat:1:5:252321:1 |
| GUID | 0 | ||
| Full Reference | Elorza, J. J., Rodriguez-Lazaro, J. (1984) Late cretaceous quartz geodes after anhydrite from Burgos, Spain. Geological Magazine, 121 (2) 107-113 doi:10.1017/s0016756800028077 | ||
| Plain Text | Elorza, J. J., Rodriguez-Lazaro, J. (1984) Late cretaceous quartz geodes after anhydrite from Burgos, Spain. Geological Magazine, 121 (2) 107-113 doi:10.1017/s0016756800028077 | ||
| In | (1984, March) Geological Magazine Vol. 121 (2) Cambridge University Press (CUP) | ||
| Abstract/Notes | AbstractThe present work describes the quartz geodes (cauliflower-like) that appear in a specific level of the Late Cretaceous (north of Burgos). Due to their special characteristics, principally anhydrite relicts and spherulitic quartz (length-slow chalcedony), they are considered as pseudomorphs of anhydrite nodules, formed during early diagenesis. At the same level compact chert nodules sporadically appear, presenting a considerable amount of sponge spicules with fibrous texture (length-fast chalcedony). The silicification of the anhydrite nodules took place before total compaction and cementation of the sediment. The source of silica is principally biogenic (sponge spicules). We offer a hypothesis to explain the formation of the anhydrite nodules since there is no link between the depositional environment and the existence in itself of anhydrite nodules. Indirectly it is possible to see the effects of an arid climate, which have not been recorded in the lithologic column here described. | ||
See Also
These are possibly similar items as determined by title/reference text matching only.
