Depositional processes and stratigraphic evolution of the Campanian deltaic system of la Anita Formation, Austral-Magallanes Basin, Patagonia, Argentina.


  • Damián Moyano Paz Centro de Investigaciones Geológicas (CONICET-UNLP), Diagonal 113 #275 (B1904DPK) La Plata, Argentina.
  • Camila Tettamanti Centro de Investigaciones Geológicas (CONICET-UNLP), Diagonal 113 #275 (B1904DPK) La Plata, Argentina.
  • Augusto N. Varela Centro de Investigaciones Geológicas (CONICET-UNLP), Diagonal 113 #275 (B1904DPK) La Plata, Argentina.
  • Abril Cereceda Centro de Investigaciones Geológicas (CONICET-UNLP), Diagonal 113 #275 (B1904DPK) La Plata, Argentina.
  • Daniel G. Poiré Centro de Investigaciones Geológicas (CONICET-UNLP), Diagonal 113 #275 (B1904DPK) La Plata, Argentina.

Palabras clave:

Facies Analysis; Deltaic Systems; Wave Processes; Fluvial Processes; Sequence Stratigraphy; Upper Cretaceous


Coastal depositional systems are commonly classified in terms of the relative interaction of wave, tide and fluvial processes. The La Anita Formation represents the opportunity to study and better understand coastal sedimentary systems. It is a poorly studied prograding siliciclastic deltaic-coastal wedge accumulated in the Campanian during the foreland stage of the Austral-Magallanes Basin. A detailed depositional process-based facies analysis have allowed the definition of 13 sedimentary facies and 9 facies associations for the La Anita Formation, ranging from prodelta to interdistributary delta-channel deposits. According to the spatial distribution of these facies associations, the La Anita Formation was divided into two informal units bounded by a regional erosion surface. The lower unit shows abundant hummocky cross-bedded and bioturbated sandstones, coarsening-upward trends and mainly aggradational to progradational vertical stacking pattern, and it was interpreted as a wave-dominated fluvial-influenced delta. The upper unit is characterized by unidirectional dune cross-bedding, coarsening-upward trend and a progradational vertical stacking pattern, and was interpreted as a fluvio-dominated delta with no evidence of tide or wave influence. These two units represent two genetically unrelated depositional sequences bounded by a regional erosion surface, which is interpreted as a sequence boundary triggered by a relative sea-level fall. The lower unit is part of a progradational highstand systems tract which involves the underlying deep-marine Alta Vista Formation. The upper unit deposits reflect a complete relative sea-level cycle which includes an undifferentiated lowstand and transgressive systems tracts and, toward the top, highstand systems tract.


Ainsworth, R.B., S.S. Flint and J.A. Howell, 2008. Predicting coastal depositional style: Influence of basin morphology and accommodation to sediment supply ratio within a sequence stratigraphic framework. In: G.J. Hampson, R.J. Steel, P.B. Burgess and R.W. Dalrymple (Eds.), Recent Advances in Models of Siliciclastic Shallow-Marine Stratigraphy. Society for Sedimentary Geology, Special Publication, 90:237-263.

Ainsworth, R.B., B.K. Vakarelov and R.A. Nanson, 2011. Dynamic spatial and temporal prediction of changes in depositional processes on clastic shorelines: Toward improved subsurface uncertainty reduction and management. AAPG Bulletin 95:267-297.

Ainsworth, R.B., B.K. Vakarelov, J.A. MacEachern, R.A. Nanson, T.I. Lane, F. Rarity and S.E. Dashtgard, 2016. Process-driven architecture variability in mouth-bar deposits: a case study from a mixed-process mouth-bar complex, Drumheller, Alberta, Canada. Journal of Sedimentary Research 86, 512- 541.

Ainsworth, B.R., B.K. Vakarelov, C.H. Eide, J.A. Howell and J. Bourget, 2019. Linking the high-resolution architecture of modern and ancient wave-dominated deltas: Processes, products, and forcing factors. Journal of Sedimentary Research 89:168-185.

Arbe, H.A., 1986. Estratigrafía, discontinuidades y evolución sedimentaria del Cretácico en la Cuenca Austral, Prov. De Santa Cruz. In: G. Chebli and L.A. Spalletti (Eds.) Cuencas Sedimentarias Argentinas. Instituto Superior de Correlación Geológica, Universidad Nacional de Tucumán, Serie de Correlación Geológica 6:419-442.

Arbe, H.A., 2002. Análisis estratigráfico del Cretácico de la Cuenca Austral. In: M.J. Heller (Ed.), Geología y Recursos Naturales de Santa Cruz. XV Congreso Geológico Argentino 103-128.

Bann, K.L., S.T. Tye, J.A. MacEachern, C.R. Fielding and B.G. Jones, 2008. Ichnological and sedimentologic signatures of mixed wave- and storm-dominated deltaic deposits: examples from the early Permian Sydney Basin, Australia. In: G.J. Hampson, R.J. Steel, P.B. Burgess and R.W. Dalrymple (Eds.), Recent Advances in Models of Siliciclastic Shallow-Marine Stratigraphy. Society for Sedimentary Geology, Special Publication, 90:293-332.

Beynon, B.M., and S.G. Pemberton, 1992. Ichnological signature of brackish water deposit, an example from the Lower Cretaceous Grand Rapids Formation, Cold Lake oil sands area, Alberta. In S.G. Pemberton (Ed.), Applications of Ichnology to Petroleum Exploration: A Core Workshop. Society for Sedimentary Geologists, 17:199-221.

Bhattacharya, J.P., and L. Giosan, 2003. Wave-influenced deltas: geomorphological implications for facies reconstruction. Sedimentology, 50:187-210.

Bhattacharya, J.P., 2006. Deltas. In: H.W. Posamentier and R.G. Walker (Eds.), Facies Models, Society for Sedimentary Geology, Special Publication, 84:237-292.

Bhattacharya, J.P., 2010. Deltas. In: R.G. Dalrymple and N.P. James (Eds), Facies Models, Fourth Edition, 233-262.

Biddle, K., M. Uliana, R. Jr. Mitchum, M. Fitzgerald and R. Wright, 1986. The stratigraphic and structural evolution of central and eastern Magallanes Basin, Southern America. In: P. Allen and P. Homewoods (Eds.), Foreland basins. International Association of Sedimentologists, Special Publication 8:41-61.

Boyd, R., R. Dalrymple and B.A. Zaitlin, 1992. Clasification of clastic coastal depositional environments. Sedimentary Geology, 80:139-150.

Buatois, L.A. and M.G. Mángano, 2011. Ichnology: Organism- Substrate Interactions in Space and Time. Cambridge University Press, 358 pp.

Catuneanu, O, 2006. Principles of sequence stratigraphy, Amsterdam, Elsevier 386 pp.

Catuneanu, O., V. Abreu, J.P. Bhattacharya, M.D. Blum, R.W. Dalrymple, P.G. Eriksson, C.R. Fielding, W.L. Fisher, W.E. Galloway, M.R. Gigbling, K.A. Giles, J.M. Holbrook, R. Jordan, C.G.St.C. Kendall, B. Marcuda, O.J. Martinsen, A.D. Miall, J.E. Neal, D. Nummedal, L. Pomar, H.W. Posamentier, B.R. Pratt, J.F. Sarg, K.W. Shanley, R.J. Steel, A. Strasser, M.E. Tucker and C. Winker, 2009. Towards the standardization of sequence stratigraphy. Earth-Science Reviews, 92:1-33.

Charvin, K., G.J. Hampson, K.L. Gallagher and R. Labourdette, 2010. Intra-parasequence architecture of an interpreted asymmetrical wave-dominated delta. Sedimentology, 57:760-785.

Clifton, H.E., 2006. A reexamination of facies models for clastic shorelines. In: H.W. Posamentier and R.G. Walker (Eds.), Facies Models, Society for Sedimentary Geology, Special Publication, 84:293-337.

Dalrymple, R.W., B.A. Zaitlin and R. Boyd, 1992. Estuarine facies models: conceptual basis and stratigraphic implications. Journal of Sedimentary Petrology, 62:147-173.

Dumas, S. and R.W.C. Arnott, 2006. Origin of hummocky and swaley cross-stratification- The controlling influence of unidirectional current strength and aggradation rate. Geology, 34:1073-1076.

Dott, R.H. and J. Bourgeos, 1982. Hummocky stratification: Significance of its variable bedding sequences. Geological Society of America Bulletin, 91: 663-680.

Eide, C.H., J.A. Howell and S.J. Buckley, 2015. Sedimentology and reservoir properties of tabular and erosive offshore transition deposits in wave-dominated, shallow-marine strata: Book Cliffs, USA. Petroleum Geology, 21:55-73.

Enge H.D., J.A. Howell and S.J., Buckley, 2010. The geometry and internal architecture of stream mouth bars in the Panther Tongue and the Ferron Sandstone members, Utah, U.S.A. Journal of Sedimentary Research, 80:1081-1031.

Everett, K.R., 1983. Histosols. In: L.P. Wilding, N.E. Smeck and G.F. Hall (Eds.), Pedogenesis and Soil Taxonomy, II. The Soil Orders, Elsevier Science Publishers, 1-53.

Fielding, C., 2010. Planform and facies variability in asymmetric deltas: facies and depositional architecture of the Turonian Ferron Sandstone in the Western Henry Mountains, south-central Utah, U.S.A. Journal Sedimentary Research, 80:455- 479.

Feruglio, E., 1938. El Cretácico superior del Lago San Martín y de las relaciones adyacentes. Physis, 12:293-342.

Feruglio, E., 1944. Estudios geológicos y glaciológicos en la región del lago Argentino (Patagonia). Boletín de la Academia Nacional de Ciencias, Córdoba, 37:3-255.

Feriglio, E., 1949. Descripción Geológica de la Patagonia. Yacimientos Petrolíferos Fiscales (YPF), I, II, III.

Fildani, A., T.D. Cope, S.A. Graham and J.L. Wooden, 2003. Initiation of the Magallanes Foreland basin: Timing of the southernmost Patagonian andes Orogeny revised by detrital zircon provenance analysis. Geology, 31: 1081-1084.

Fosdick, J.C., B.W. Romans, A. Fildani, A. Bernhardt, M. Calderón and S.A. Graham, 2011. Kinematic evolution of the Patagonian retroarc fold-and-thrust belt and Magallanes foreland basin, Chile and Argentina, 51°30´S. Geological Society of America Bulletin, 123:1679-1698.

Galloway, W.E., 1975. Process framework for describing the morpholofic and stratigraphic evolution of deltaic depositional system. In: M.L. Broussard (Ed.), Deltas, Models for Exploration. Houston Geological Society 87-98.

Ghiglione, M.C., J. Likerman, V. Barberón, L. Beatriz Giambiagi, B. Aguirre-Urreta and F. Suarez, 2014. Geodynamic context for the deposition of coarse-grained deep-water axial channel systems in the Patagonian Andes. Basin Research, 26:726-745.

Ghiglione, M.C., M. Naipauer, C. Sue, V. Barberón, V. Valencia, B. Aguirre-Urreta and V.A. Ramos, 2015. U-Pb zircon ages from the northern Austral basin and their correlation with the Early Cretaceous exhumation and volcanism of Patagonia. Cretaceous Research, 55:116-128.

Gibert, J.M. and J. Martinell, 1993. Controles ambientales sobre la distribución de las paleoicnocenosis en el estuario Plioceno del Baix Llobregat (Barcelona, Cataluya). Revista Española de Paleontología, 8:140-146.

Gugliotta, M. S.S. Flint, D.M. Hodgson, and G.D. Veiga, 2015. Stratigraphic record of river-dominated crevasse subdeltas with tidal influence (Lajas Formation, Argentina). Journal of Sedimentary Research, 85, 265-284.

Isla, M.F., E. Schwarz and G.D. Veiga, 2018. Bedset characterization within a wave-dominated shallow-marine succession: An evolutionary model related to sediment imbalances. Sedimentary Geology, 374:36-52.

Kraemer, P.E. and A.C. Riccardi, 1997. Estratigrafía de la región comprendida entre los lagos Argentino y Viedma (49° 40’– 50°10’ LS), Provincia de Santa Cruz. Revista de la Asociación Geológica Argentina, 52:333-360.

Kraemer, P.E., J.V. Ploszkiewicz and V.A. Ramos, 2002. Estructura de la cordillera patagónica austral entre los 46º y 52º S. In: M.J. Haller (Ed.), Geología y Recursos Naturales de Santa Cruz. Relatorio del XV Congreso Geológico Argentino, 353- 364.

Kurcinka C., R.W., Dalrymple and M. Gugliotta, 2018. Facies and architecture of river-dominated to tide-influenced mouth bars in the lower Lajas Formation (Jurassic), Argentina, AAPG Bulletin, 102:885-912.

Leanza, A.F., 1972. Andes Patagónicos Australes. In: A.F. Leanza (Ed) Geología Regional Argentina, 689-706.

Li, W., J.P. Bhattacharya, Y. Zhue, D. Garza and E. Blankenship, 2011. Evaluating delta asymmetry using three-dimensional facies architecture and ichnological analysis, Ferron ‘Notom Delta’, Capital Reed, Utah, USA. Sedimentology, 58:478-507.

MacEachern, J.A. and M.K. Gingras, 2007. Recognition of brackish-water trace fossil assemblages in the Cretaceous western interior seaway of Alberta. In R. Bromley, L.A. Buaois, M.G. Mángano, J. Genise, R. Melchor (Eds.), Sediment- Organism Interactions: A Multifaceted Ichnology. Society for Sedimentary Geology, Special Publication 88:149-194.

MacEachern, J.A., K.L. Bann, J.P. Bhattacharya and C.D. Howell, 2005. Ichnology of deltas. In: J.P. Bhattacharya and L. Giosan (Eds.), River Deltas: Concepts, Models and Examples. Society for Sedimentary Geology, Special Publication 83:49-86.

MacEachern, J.A., K.L. Bann, S.G. Pemberton and M.K. Gingras, 2007. The ichnofacies paradigm: high resolution paleoenvironmental interpretation of the rock record. In: J.A. MacEachern, K.L. Bann, M.K. Gingras and S.G. Pemberton (Eds.), Applied Ichnology. Society for Sedimentary Geology, Short Course Notes 52:65-93.

MacEachern, J.A. S.G. Pemberton, M.K. Gingras and K.L. Bann, 2010. Ichnology and Facies Models. In: R.W. Dalrymple and N.P. James (Eds.), Facies Models 4. Geological Association of Canada, St. John’s, Geotext 6:19-58.

MacEachern, J.A., K.L. Bann, M.K. Gingras, J.P. Zonneveld, S.E. Dashtgard and S.G. Pemberton, 2012. The ichnofacies paradigm. Developments in Sedimentology, 64:103-138.

Macellari, C.E., C.A. Barrio and M.J. Manassero, 1989. Upper Cretaceous to Paleocene depositional sequences and sandstone petrography of southwestern Patagonia (Argentina and Chile). Journal of South American Earth Science, 2:223-239.

Malkowski, M.A., G.R. Sharman, S.A. Graham and A. Findani, 2015. Characterization and diachronous initiation of coarse clastic deposition in the Magallanes-Austral foreland basin, Patagonian Andes. Basin Research, 29:298-326.

Malkiwski, M.A., T. Schwartz, G.R. Sharmann, Z.T. Sickmann and S.A. Graham, 2017. Stratigraphic and provenance variations in the early evolution of the Magallanes-Austral foreland basin: Implications for the role of longitudinal versus transverse sediment dispersal during arc-continent collision. The Geological Society of America Bulletin, 129:349-371.

Manassero, M.J., 1988. Petrografía y procedencia de las areniscas cretácicas superiores de la Cuenca Austral Argentina. Revista de la Asociación Geológica Argentina, 47:73-82.

Marinelli, R.V., 1998. Reservorios Deltaicos de La Formación Piedra Clavada. Boletín de Informaciones Petroleras, 15:28-37.

Moyano Paz, D., C. Tettamanti and D.G. Poiré, 2016. Análisis de facies, composición y procedencia de las psamitas de la Formación La Anita (Cretácico tardío) en el Cerro Calafate, Santa Cruz. VII Congreso Latinoamericano de Sedimentología and XV Reunión Argentina de Sedimentología, Actas: 122 p.

Moyano Paz, D., C. Tettamanti, A.N. Varela and D.G. Poire, 2018. Estratigrafía y sedimentología de la Formación La Anita, Cuenca Austral, Patagonia, Argentina: Una visión a partir de análisis de facies, paleocorrientes y trazas fósiles. XVI Reunión Argentina de Sedimentología, Actas: 163 p.

Mjøs, R., O. Walderhaug and E. Prestholm, 1993. Crevasse splays sandstones geometries in the Middle Jurassic Ravenscar Group Yorkshire, UK. In: M. Marzo and C. Puigdefáfregas (Eds.), Alluvial Sedimentation, International Association of Sedimentologists, Special Publication 17:167-184.

Myrow, P.M. and J.B. Southard, 1996. Tempestite deposition. Journal of Sedimentary Research, 66:875-887.

Olariu, C. and J.P. Bhattacharya, 2006. Terminal distributary channels and delta front architecture of river-dominated delta systems. Journal of Sedimentary Research, 76:212-233.

Olariu, C., R.J. Steel and A.L. Petter, 2010. Delta-front hyperpycnal bed geometry and implications for reservoir modeling: Cretaceous Panther Tongue delta Book Cliffs, Utah. The American Association of Petroleum Geologists, 94:819-845.

Pankhurst, R.J., T.R. Riley, C.M. Fanning and S.P. Kelley, 2000. Episodic silicic Volcanism in Patagonia and Antartic Peninsula: Chronology of magmatism associated with the break-up of Gondwana. Journal of Petrology, 41:605-625.

Perez-Arlucea, M. and N.D. Smith, 1999. Depositional patterns following the 1870s avulsion of the Saskatchewan River (Cumberland Marshes, Saskatchewan, Canada). Journal of Sedimentary Research, 69:62-73.

Peroni, G., M. Cagnolatti and M. Pedrazzini, 2002. Cuenca Austral: marco geológico y reserva histórica de la actividad petrolera. In: M. Schiuma, G. Hinterwimmer, and G. Vergani (Eds.), Simposio Rocas Reservorio de las Cuencas Productivas de la Argentina. V Congreso de Exploración y Desarrollo de Hidrocarburos, 11-19.

Plint, A.G., 2010. Wave- and storm-dominated shoreline and shallow-marine systems. In R.W. Dalrymple and N.P. James (Eds), Facies models 4, Geological Association of Canada, 167- 200.

Reineck, H.E. and I.B. Singh, 1980. Depositional Sedimentary Environments: With Reference to Terrigenous Clastic. Springer- Verlag, New York, 549 pp.

Retallack, G.J., 2001. Soils of the past: An introduction to Paleopedology, Second Edition. Blackwell Science, Oxford, 404 pp.

Riccardi A.C. and E.O. Rolleri, 1980. Cordillera Patagónica Austral. In J.C.M. Turner (Ed) Segundo Simposio de Geología Regional Argentina. Academia Nacional de Ciencia II, 1173- 1304.

Riccardi A.C., 1983. Informe paleontológico de los perfiles Estancia Alta Vista, Arroyo El Turbio. Inedit report of Yacimientos Petrolíferos Fiscales (YPF).

Richiano, S., A.N. Varela, A. Cereceda and D.G. Poiré, 2012. Evolución paleoambiental de la Formación Río Mayer, Cretácico inferior, Cuenca Austral, provincia de Santa Cruz, Argentina. Latin American Journal of Sedimentology and Basin Analysis 19:3-26.

Richiano, S., D.G. Poiré and A.N. Varela, 2013. Icnología de la Formación Río Mayer, Cretácico inferior, sudoeste de Gondwana, Patagonia, Argentina. Ameghiniana, 50:273-286.

Richiano, S., A.N. Varela, L.E. Gómez-Peral, A. Cereceda and D.G. Poiré, 2015. Composition of the Lower Cretaceous source rock from the Austral Basin (Río Mayer Formation, Patagonia, Argentina): Regional implication for unconventional reservoirs in the Southern Andes. Marine and Petroleum Geology, 66:764-790.

Robbiano, J.A., H. Arbe and A. Bangui, 1996. Cuenca Austral Marina. In: V.A. Ramos and M. Turic (Eds.), XII Congreso Geológico Argentino and Congreso de Exploración de Hidrocarburos, 343-358.

Rodríguez, A.B., M.D. Hamilton and J.B. Anderson, 2000. Faciesand evolution of the modern Brazos Delta, Texas: wave versus flood influence. Journal of Sedimentary Research, 70, 283- 295.

Rodríguez, J. and M. Miller, 2005. Cuenca Austral. In: Frontera Exploratoria de la Argentina. VI Congreso de Exploración y Desarrollo de Hidrocarburos, 307-324.

Sickmann, Z.T., T.M. Schwartz and S.A. Graham, 2018. Refining stratigraphy and tectonic history using detrital zircon maximum depositional age: an example from Cerro Fortaleza, Austral Basin, southern Patagonia. Basin Research, 30:708- 729.

Sømme, T.O., J.A. Howell, G.J. Hampson and J.E.A. Storms, 2008. Genesis, architecture, and numerical modeling of intra-parasequence discontinuity surfaces in wave-dominated deltaic deposits: Upper Cretaceous Sunnyside Member, Blackhawk Formation, Book Cliffs, Utha, U.S.A. In: G.J. Hampson, R.J. Steel, P.B. Burgess and R.W. Dalrymple (Eds.), Recent Advances in Models of Siliciclastic Shallow-Marine Stratigraphy. Society for Sedimentary Geology, Special Publication, 90:421-441.

Taylor, A.M. and R. Goldring, 1993. Description and analysis of bioturbation and ichnofabric. Journal of the Geological Society of London, 150:141-148.

Tettamanti, C., D. Moyano Paz, A.N. Varela, L.E. Gómez- Peral, D.G. Poiré, A. Cereceda and L.A. Odino, in press. Sedimentology and stratigraphy of the uppermost Cretaceous Continental Deposits of the Austral-Magallanes Basin, Patagonia, Argentina. Latin American Journal of Sedimentology and Basin Analysis, Special Publication, in press.

Varela, A.N., 2015. Tectonic control of accommodation space and sediment supply within the Mata Amarilla Formation (lower Upper Cretaceous) Patagonia, Argentina. Sedimentology, 62:867-896.

Varela, A.N., D.G. Poiré, T. Martin, A. Gerdes, F.J. Goin, J.N. Gelfo and S. Hoffmann, 2012a. U-Pb zircon constraints on the age of the Cretaceous Mata Amarilla Formation, Southern Patagonia, Argentina: its relationship with the evolution of the Austral Basin. Andean Geology, 39:359-379.

Varela, A.N., G.D. Veiga, and D.G. Poiré, 2012b. Sequence stratigraphic analysis of Cenomanian greenhouse palaeosols: A case study from southern Patanoia, Argentina. Sedimentary Geology, 271-272: 67-68.

Varela, A.N., L.E. Gómez-Peral, S. Richiano and D.G. Poiré, 2013. Distinguishing similar volcanic source areas from an integrated provenance analysis: implication from foreland Andean basins. Journal of Sedimentary Research, 83:258-276.

Varela A.N., M.S. Raigemborn, S. Richiano, T. White, D.G. Poiré and S. Lizzoli, 2018. Late Cretaceous paleosols as paleoclimate proxies of high-latitude Southern Hemisphere: Mata Amarilla Formation, Patagonia, Argentina. Sedimentary Geology, 363:83-95.

Wright L.D., 1977. Sediment transport and deposition at river mouths: a synthesis. Journal of Sedimentary Research, 70:788- 802.




Cómo citar

Moyano Paz , D. ., Tettamanti, C. ., Varela, A. N. ., Cereceda, A. ., & Poiré, D. G. . (2021). Depositional processes and stratigraphic evolution of the Campanian deltaic system of la Anita Formation, Austral-Magallanes Basin, Patagonia, Argentina. Latin American Journal of Sedimentology and Basin Analysis, 25(2), 69-92. Recuperado a partir de



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