Este artículo es de Acceso Abierto y puede ser descargado en su versión final desde nuestro repositorio
Consulte la política de Acceso Abierto del editor


Microbial oncoids have been found in the Oxfordian limestones of the La Manga Formation in the La Vaina section at Potimalal River, Mendoza province. The oncoids ocurr either in packstone or floatstone-rudstone or are scattered in the wackestones. They are mostly elliptical, ameboidal and subordinately spherical in shape. Different types of oncoids were recognized, according to their features of envelopes: (1) micritic laminations, (2) grumose laminations, and (3) organism-bearing laminations. Molluscs and echinoid fragments, peloids, and intraclasts acted as oncoid nuclei. Laminae follow the shape of nuclei, especially in the inner zone of the cortices. However, in the outer zones the laminae contain encrusting organisms dominated by nubeculariids and serpulids. Some oncoids, especially the ameboidal or elliptical forms, are characterized by multiple nuclei, represented by small oncoids. The oncoids are associated with bivalves, echinoderms, forams, and serpulids. The fauna is indicative of calm, shallow conditions and the excellent preservation of echinoderms suggests minimal transport prior to burial. Growth histories are in evidence. The oncoids grew in a shallow, low energy, slightly to moderate agitated subtidal normal sea water environment. The limited rolling growth oncoids was probably accompanished by intermittent currents that reoriented the oncoids parallel to stratification. The discontinuous organisms-bearing laminations reflect periods of non-agitation and litification, which facilitated the growth of encrusting organisms on static oncoid particles during a period of low sedimentation rate. Deposition of the oncoid-bearing limestones took place during shallowing of the carbonate interval and associated with emersion, subaerial exposition and paleokarst as consequence of sea level fluctuations.


Documento: Artículo
Título:Osagids-types oncoids from La Manga Formation and their paleoecological significance, La Vaina Creek, Mendoza
Autor:Palma, R.M.; Bressan, G.S.; Kietzmann, D.A.
Filiación:Facultad de Ciencias Exactas y Naturales, Depto. de Ciencias Geológicas, Pabellón II, Ciudad Universitaria (1428) Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
Palabras clave:Jurassic; La Manga Formation; Oncoids; bivalve; echinoderm; growth rate; Jurassic; lamination; limestone; microorganism; micropaleontology; morphology; oncolite; paleoecology; paleoenvironment; sedimentation rate; Argentina; Mendoza; South America; Bivalvia; Echinodermata; Echinoida; Foraminifera; Mollusca; Nubeculariidae; Serpulidae
Página de inicio:116
Página de fin:123
Título revista:Revista de la Asociacion Geologica Argentina
Título revista abreviado:Rev. Asoc. Geol. Argent.


  • Bernhard, J.M., Bowser, S.S., Bacterial biofilms as a trophic resource of certain foraminifera. Marine Ecology (1992) Progress Series, 83, pp. 263-272. , Halstenbek, Berlín
  • Burkhalter, R.M., Ooidal ironstones and ferruginous microbialites: Origin and relation to sequence stratigraphy (Aalenian and Bajocian, Swiss Jura mountains) (1995) Sedimentology, 42, pp. 57-74
  • Chafetz, H.S., Marine peloids: A product of bacterially induced precipitation of calcite (1986) Journal of Sedimentary Petrology, 56, pp. 812-817
  • Dahanayake, K., Classification of oncoids from the Upper Jurassic carbonates of the French Jura (1977) Sedimentary Geology, 18, pp. 337-353
  • Dellapé, D.A., Mombrú, C., Riccardi, C.A., Uliana, M.A., Westermann, G.E.G., Edad y correlación de la Formación Tábanos en Chacay Melehue y otras localidades de Neuquen y Mendoza. Con consideraciones sobre la distribución y el significado de las sedimentitas Lotenianas (1979) Museo La Plata, Obra Centenario, 5, pp. 81-105. , La Plata
  • Dragastan, O., Micro-oncolithes dans le Jurassique supérieur de la vallé du Bicaz (Carpates Orientales, Roumanie) (1970) Bulletin de la Societé Géologique de France, 11, pp. 655-659
  • Flügel, E., Microfacies of carbonate rocks (2004) Analysis, interpretation and application, , Springer-Verlag, 976 p. Berlín
  • Flügel, E., Steiger, T., An Upper Jurassic sponge-algal buildup from the northern Frankenalb, West Germany (1981) European Fósil Reef Models, pp. 371-397. , Toomey, D.F, ed, Society Economists. Paleontologists Mineralogists, Special Publication 30:, Tulsa
  • Fürsich, F.T., Genesis, environments, and ecology of Jurassic hardgrounds. Neues Jahrbuch für Geologie und Paléontologie (1979) Abhandlungen, 158, pp. 1-63
  • Gebelein, C.D., Distribution, morphology and accretion rate of Recent subtidal algal stromatolites, Bermuda (1969) Journal of Sedimentary Petrology, 39, pp. 49-69
  • Gerdes, G., Dunajtschik-Piewak, K., Riege, H., Taber, A.G., Krumbein, W.E., Reineck, H.E., Structural diversity of biogenic carbonate particles in microbial mats (1994) Sedimentology, 41, pp. 1273-1294
  • Gulisano, C.A., Gutiérrez Pleimling, A.R., Field Trips Guidebook B, Neuquén Basin, Mendoza Province (1994) 4th International Congress on Jurassic Stratigraphy and Geology, , 113 p
  • Gulisano, C.A., Gutiérrez Pleimling, A.R., Digregorio, R.E., Esquema estratigráfico, de la secuencia jurásica del oeste de la provincia de Neuquen. 9° Congreso Geológico Argentino (1984) Actas, 1, pp. 236-259. , Buenos Aires
  • Gulisano, C.A., Gutiérrez Pleimling, A.R., Digregotio, R.E., Análisis estratigráfico del intervalo Tithoniano-Valanginiano (formaciones Vaca Muerta, Quintuco y Mulichinco) en el suroeste de la provincia del Neuquen. 9° Congreso Geológico Argentino (1984) Actas, 1, pp. 221-235. , Buenos Aires
  • Kinsman, D.J.J., Park, R.K., Recent algal mats of a Persian Gulf Lagoon (1976) Journal of Sedimentary Petrology, 38, pp. 1040-1058
  • Kuss, J., Middle Jurassic calcareous algae from the Circum-Arabian area (1990) Facies, 22, pp. 59-86
  • Leeder, M.R., Lower Border Group (Tournaisian) stromatolites from the North-humberland Basin (1975) Scottian Journal of Geology, 11, pp. 207-226
  • Legarreta, L., Evolution of a Callovian-Oxfordian carbonate margin in the Neuquén Basin, of westcentral Argentina: Facies, architecture, depositional sequences and global sea-level changes (1991) Sedimentary Geology, 70, pp. 209-240
  • Legarreta, L. 2001. Desiccation events and non-marine clastic lowstands in the Neuquén Basin: stratigraphy, facies and hydrocarbon distribution. American Association of Petroleum Geologists, Hedberg Conference, Abstracts 28-29, Mendoza; Legarreta, L., Gulisano, C.A., Análisis estratgráfico de la Cuenca Neuquina (Triásico Superior- Terciario Inferior) (1989) Serie Correlación Geológica, 6, pp. 221-243. , Chebli, G.A. y Spalletti, L, eds, Cuencas Sedimentarias Argentinas, Simposio Cuencas Sedimentarias Argentinas, Tucumin
  • Legarreta, L., Uliana, M.A., The Jurassic succession in west-central Argentina: Stratal pattern, sequences and paleogeographic evolution (1996) Paleogeography, Paleoclimatology and Paleoecology, 120, pp. 303-330
  • Leinfelder, R.R., Nose, M., Schmid, D.U., Werner, W., Microbial crust of the late Jurassic: Composition, palaeoecological significance and importance in reef constructions (1993) Facies, 29, pp. 195-230
  • Logan, B.W., Rezak, R., Ginsburg, R.N., Classification and environmental significance of algal stromatolites (1964) Journal of Geology, 72, pp. 68-83
  • Massari, E., Oncoids ans stromatolites in the Rosso Ammonitico sequences (Middle-Upper Jurassic) of the Venetian Alps, Italy (1983) Coated Grains, pp. 358-366. , Peryt. T, ed, Springer-Verlag, Berlin
  • Monty, C.L.V., (1967) Distribution and structure of Recent stromatolitic algal mats, Eastern Andros Island, 90, pp. 55-100. , Bahamas. Annales Société Géologique Belgique, Bruselas
  • Monty, C.L.V., Recent algal stromatolite deposits, Andros Island, Bahamas. Preliminary report (1972) Geologishes Rundshaw, 61, pp. 742-783. , Heidelberg
  • Monty, C.L.V 1979a. Scientific report of the Belgian expedition on the Australian Great Barrier Reefs, 1967. Sedimentology: 2. Monospecific stromatolites from the Great Barrier Reefs tract and their paleontological significance. Annales Société Géologique Belgique 101: 163-171, Bruselas; Palma, R.M., Lo Forte, G., Piethé, R.D., Crousse, L., González Pelegri, E., Bressan, G., Biohermas de esponjas y tipos de microbialitas en La Formación La Manga (Oxfordiano), Cuenca Neuquina, Mendoza (2004) Reunión Argentina de Sedimentologia, Resúmenes, 10. , 126, San Luis
  • Palma, R.M., López Gómez, J., Piethé, R.D., Oxfordian mixed platform systems (La Manga. Formation) in the Bardas Blancas area (Mendoza Province) Neuquén Basin, Argentina: Facies, units and depositional sequences (2006) Sedimentary Geology, , en prensa
  • Peryt, T.M., Structure of Sphaerocodium kokeni Wagner "a Girvanella oncoid" from the Upper Muschelkalt (Middle Triassic) of Württember, SW Germany (1980) Neues Jahrbuch Geologische Paläontologische, Monohage, pp. 293-302
  • Peryt, T.M., Phanerozoic oncoids-an overview (1981) Facies, 4, pp. 197-214
  • Peryt, T.M., Oncoids: Comments to recent developments (1983) Coated Grains, pp. 273-275. , Peryt, T.M, ed, Springer-Verlag, Berlin
  • Peryt, T.M., Peryt, D., Association of sessile tubular foraminifera and cyanophytic algae (1975) Geological Magazine, 112, pp. 612-614
  • Stipanicic, P.N., Westermann, G.E.G., Riccardi, A.C., The Indo-Pacific Ammonite Mayaites in the Oxfordian of Southern Andes (1976) Ameghiniana, 12 (4), pp. 281-305. , Buenos Aires
  • Rat, P., Nubecularia reicheli nov. sp., Foraminifere constructeur de fausses oolithes dans le Bajocien de Bourgogne. (1966) Eclogae Geologicae Helvetiae, 59, pp. 73-85
  • Riccardi, A.C., Las asociaciones de amonitas del Jurásico y Cretácico de Argentina (1984) 9° Congreso Geológico Argentino, Actas, 6, pp. 559-595. , San Carlos de Bariloche
  • Riding, R., Girvanella and other algae as depth indicators (1975) Lethaia, 8, pp. 173-179
  • Riding, R., Cyanolithes: Skeletal oncolites formed by calcified blue-green algae (abstract) (1979) 2° Sympossium International Algues Fossiles, p. 1. , Résumés, Paris
  • Shinn, E.A., Practical significance of birdeye structures in carbonate rocks (1968) Journal of Sedimentary Petrology, 38, pp. 215-223. , Tulsa
  • Teichert, C., Oolite, oolith, ooid: Discussion (1970) American Association Petroleum Geologists Bulletin, 54, pp. 1748-1749. , Tulsa
  • Toomey, D.F. 1974. Algally coated grains from the Leavenworth Limestones (U. Pennsylv., Midcontinent region, USA). Neues Jahrbuch für Geologic und Paläontologie, Monatshefte 3: 133-192, Stuttgart; Varadé, R., Gerster, R., Olea, G., Bolatti, N., Vitulli, N., Howard, D., Análisis símico regional de rampa carbonática en la Cuenca Neuquina (Argentina). (1998) Boletín de Informaciones Petroleras, pp. 24-33. , Buenos Aires
  • Verecchia, E.P., Freytet, P., Julien, J., Baltzer, F., The inusual hydrodinamical behaviour of freshwaer oncolites (1997) Sedimentary Geology, 113, pp. 225-243. , Amsterdam
  • Wolf, K.H., Grain diminution of algal colonies to micrite (1965) Journal of Sedimentary Petrology, 35, pp. 420-427. , Tulsa


---------- APA ----------
Palma, R.M., Bressan, G.S. & Kietzmann, D.A. (2007) . Osagids-types oncoids from La Manga Formation and their paleoecological significance, La Vaina Creek, Mendoza . Revista de la Asociacion Geologica Argentina, 62(1), 116-123.
Recuperado de [ ]
---------- CHICAGO ----------
Palma, R.M., Bressan, G.S., Kietzmann, D.A. "Osagids-types oncoids from La Manga Formation and their paleoecological significance, La Vaina Creek, Mendoza " . Revista de la Asociacion Geologica Argentina 62, no. 1 (2007) : 116-123.
Recuperado de [ ]
---------- MLA ----------
Palma, R.M., Bressan, G.S., Kietzmann, D.A. "Osagids-types oncoids from La Manga Formation and their paleoecological significance, La Vaina Creek, Mendoza " . Revista de la Asociacion Geologica Argentina, vol. 62, no. 1, 2007, pp. 116-123.
Recuperado de [ ]
---------- VANCOUVER ----------
Palma, R.M., Bressan, G.S., Kietzmann, D.A. Osagids-types oncoids from La Manga Formation and their paleoecological significance, La Vaina Creek, Mendoza . Rev. Asoc. Geol. Argent. 2007;62(1):116-123.
Available from: [ ]