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Late cretaceous quartz geodes after anhydrite from Burgos, Spain

Published online by Cambridge University Press:  01 May 2009

J. J. Elorza  and
J. Rodriguez-Lazaro
J. J. Elorza
Affiliation:
Departamento de Geologia, Facultad de Ciencias, Universidad del Pais Vasco, Apartado 644, Bilbao, Spain
J. Rodriguez-Lazaro
Affiliation:
Departamento de Geologia, Facultad de Ciencias, Universidad del Pais Vasco, Apartado 644, Bilbao, Spain
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Abstract

The 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.

Type
Articles
Information
Geological Magazine , Volume 121 , Issue 2 , March 1984 , pp. 107 - 113
Copyright
Copyright © Cambridge University Press 1984

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References

Arbey, F. 1980. Les formes de la silice et l'indentification des évaporites dans les formations silicifiées. Bulletin des centres de recherches exploration-production Elf-Aquitaine 4, 309–65.Google Scholar
Babinot, J. F. & Colin, J. P. (in press). Marine late Cretaceous ostracode faunas from Southwestern Europe: Paleoecological synthesis. 8th International Symposium on Ostracodes (Houston, Texas, July 1982). In Special Publications of the Society of Economic Paleontologists and Mineralogists, U.S.A.Google Scholar
Braitsch, O. 1971. Salt Deposits, Their Origin and Composition. Springer, Berlin. 297 pp.CrossRefGoogle Scholar
Bustillo, M. A. 1976. Texturas de las rocas silíceas inorgánicas en ambiente continental y significado genético. Estudios Geológicos 32, 371–83.Google Scholar
Carreras Suarez, F. J. & Ramirez Del Pozo, J. 1979. Mapa Geológico de España. Escala 1: 50 000. Explicación de la Hoja n° 135 (Sedano). Instituto Geológico y Minero de España.Google Scholar
Ciry, R. 1940. Etude géologique d'une partie des provinces de Burgos, Palencia, León et Santander. Thèse, Facultédes Sciences, Paris. Bulletin Sociéte Histoire Naturale, Toulouse 74, 519 pp.Google Scholar
Chowns, T. M. & Elkins, J. E. 1974. The origin of quartz geodes and cauliflower cherts through the silicification of anhydrite nodules. Journal of Sedimentary Petrology 44, 885–903.Google Scholar
Daples, E. C. 1979. Silica as an agent in diagenesis. In Diagenesis in Sediments and Sedimentary Rocks. Elsevier, Amsterdam. Vol. 25A, pp. 99–141.CrossRefGoogle Scholar
Fisher, I. S. 1976. Distribution of Mississippian geodes and geodal minerals in Kentucky. Economic Geology 71, 864–9.Google Scholar
Floquet, M. 1978. La sédimentation de plate–forme au Crétacé supérieur dans la Vieille Castille (Espagne): évolution verticale, variation horizontale; implications paléogéographiques. Bulletin de la Société Géologique de France XX (5), 779–83.CrossRefGoogle Scholar
Floquet, M. 1979 a. Corrélations sédimentologiques hypothétiques entre carbonates de plataforme et confirmation paléontologique: exemple entre Turonien et Coniacien en Vieille Castille (Espagne). VIIeme. Reunion Annuelle des Sciences de la Terre, 'Lyon.Google Scholar
Floquet, M. 1979 b. La serie carbonatée Coniacien superieur a Santonien dans la Region de Sorie (Chaines ibériques septentrionales): analyse et interpretations. Cuadernos de Geologia Iberica 5, 365–83.Google Scholar
Floquet, M. & Monty, C. 1980. Stromatolites et laminations cyanobactérieunes dans le Crétacé superieur du NE de la Meseta Iberica. VIIIeme. Reunion Annuelle des Sciences de la Terre, Marseille.Google Scholar
Floquet, M., Alonso, A. & Melendez, A. 1982. El Cretácico superior de Cameros-Castilla. In El Cretácico de España, pp. 387–453, Universidad Complutense, Madrid.Google Scholar
Folk, R. L. & Pittman, J. S. 1971. Length-slow chalcedony: a new testament for vanished evaporites. Journal of Sedimentary Petrology 41, 1045–58.Google Scholar
Folk, R. L. & Land, L. S. 1975. Mg/Ca ratio and salinity: two controls over crystallization of dolomite. Bulletin of American Association of Petroleum Geologists 59, 60–8.Google Scholar
Hatfield, C. B. 1975. Replacement of fossils by length-slow chalcedony and associated dolomitization. (Discussion of paper by Jacka, A. D., J. Sed. Pet. v. 44, 421–7). Journal of Sedimentary Petrology 45, 951–2.Google Scholar
Hayes, J. B. 1964. Geodes and concretions from the Mississippian Warsaw Formation, Keokuk region, Iowa, Illinois, Missouri. Journal of Sedimentary Petrology 34, 123–33.Google Scholar
Hennebert, M. & Hance, L. 1980. Presence de nodules de sulfate de calcium silicifies dans le Viseen Moyen (CF V2bβ) A Vedrin (Namur, Belgique). Annales de la Societé Géologique de Belgique 103, 25–33.Google Scholar
Jacka, A. D. 1974. Replacement of fossils by length-slow chalcedony and associated dolomitization. Journal of Sedimentary Petrology 44, 421–7.Google Scholar
Krauskopf, K. B. 1979. Introduction to Geochemistry. 2nd ed. McGraw-Hill, New York. 617 pp.Google Scholar
Milliken, K. L. 1979. The silicified evaporite syndrome. Two aspects of silicification history of former evaporite nodules from southern Kentucky and northern Tennessee. Journal of Sedimentary Petrology 41, 245–56.Google Scholar
Ramirez Del Pozo, J. 1971. Bioestratigrafia y microfacies del Jurásico y Cretácico del Norte de España (Región Cantábrica). Memorias del Instituto Geológico y Minero de España 78, 1–357.Google Scholar
Schmitt, J. G. & Boyd, D. W. 1981. Patterns of silicification in Permian Pelecypods and Brachiopods from Wyoming. Journal of Sedimentary Petrology 51, 1297–1308.Google Scholar
Siedlecka, A. 1972. Length-slow chalcedony and relicts of sulphates; evidence of evaporitic environments in the Upper Carboniferous and Permian beds of Bear Island, Svalbard. Journal of Sedimentary Petrology 42, 812–16.Google Scholar
Siedlecka, A. 1976. Silicified Precambrian evaporite nodules from northern Norway: a preliminary report. Sedimentary Geology 16, 161–75.CrossRefGoogle Scholar
Shukla, V. & Friedman, G. M. 1981. An unusual occurrence of surficial anhydrite in a moist temperature zone: Example from the Lockport Formation (Middle Silurian) of New York. Sedimentary Geology 29, 125–31.CrossRefGoogle Scholar
Truc, G. 1980. Paléoécologie des series à évaporites. Bulletin des centres de recherches exploration-production Elf-Aquitaine 4, 367–9.Google Scholar
Tucker, M. E. 1976 a. Quartz replaced anhydrite nodules (Bristol Diamonds) from the Triassic of the Bristol District. Geological Magazine 113, 569–74.CrossRefGoogle Scholar
Tucker, M. E. 1976 b. Replaced evaporites from the late Precambrian of Finnmark, Arctic Norway. Sedimentary Geology 16, 193–204.CrossRefGoogle Scholar
Upchurch, S. B., Strom, R. N. & Nuckels, M. G. 1981. Silicification of Miocene rocks from Central Florida. Symposium on the Miocene of the South-eastern United States. Florida, March 1981.Google Scholar
West, I. M. 1965. Macrocell structure in enterolithic veins in British Purbeck gypsum and anhydrite. Yorkshire Geological Society Proceedings 35, 47–58.CrossRefGoogle Scholar
West, I. M. 1973. Vanished evaporites: significance of strontium minerals. Journal of Sedimentary Petrology 43, 278–9.Google Scholar
Wiedmann, J. 1979. Itineraire geologique a traves le Crétacé Moyen des Chaines vascogotiques et celtiberiques (Espagne du Nord). Cuadernos de Geologia Ibérica 5, 127–214.Google Scholar