Archives - Page 2

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  Vol. 6 No. 1 (2008): GEOSUR 2004: Mesozoic to Quarternary evolution of Tierra del Fuego and neighbouring austral regions II

  Cover caption: Folds related to Late Cretaceous Fuegian Andes compressional events - Bahia Ensenada, West of Ushuaia, Lemaire Formation.

  Author: M. Menichetti.

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  Vol. 5 No. 4 (2007): GEOSUR 2004: Mesozoic to Quarternary evolution of Tierra del Fuego and neighbouring austral regions I

  Cover caption: The glacial valley of Laguna Esmeralda with the Albino and Domo Blanco glaciers (Sierra Alvear in Isla Grande de Tierra del Fuego). The Upper Jurassic Lemaire Fm rhyolites in the foreground are thrusted over the Lower Cretaceous Yahgán Fm black mudstones, which crop out in the surrounding peaks (altitude about 1,400 m above sea level).

  Author: M. Menichetti.

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  Vol. 5 No. 3 (2007)

  Cover caption: Devonian sandstones in the Tadrat region, West of Djanet, Sahara.

  Author: T. Ferreiro.

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  Vol. 5 No. 2 (2007)

  Cover caption: Stratification and cleavage in the St. Vito Formation sandstones (Middle Cambrian-Lower Ordovician). Arburese, Sardinia, North-Western Mediterranean.

  Author: Josep Maria Casas.

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  Vol. 5 No. 1: Dedicated to Francesc Calvet (II)

  Cover caption: The Corones Fm (Lower Eocene) outcropping in the Gaudi Artigas Gardens. La Pobla de Lillet, (South-eastern Pyrenees, Catalonia, Spain).

  Author: A. Permanyer.

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  Vol. 4 No. 4 (2006)

  Cover caption: Round notch in a leaf edge produced by leafcutter bees (left), and Agromyzidae (Diptera) mines in a leaf (right). Both are widespread examples of insect-plant interaction.

  Author: X. Delclós.

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  Vol. 4 No. 3 (2006)

  Cover caption: Left: Idiomorphic dolomite crystals brotrioidal sphalerite (upper margin 4.2 mm wide). Right: Close up of one of the replacing dolomite crystals at the up left corner (lower margin 2.8 mm wide), Galmoy ore, Ireland.

  See paper by Merino et al. in this issue.

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  Vol. 4 No. 1-2 (2006): Caribbean Plate Tectonics. Stratigraphic, Magmatic, Metamorphic and Tectonic Events (UNESCO/IUGS IGCP Project 433)

  Cover caption: Caribbean Sea Regions (from USGS CMG InfoBank Atlas, http://walrus.wr.usgs.gov/infobank).
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  Vol. 3 No. 4 (2005): Ordovician revisited: Reconstructing a unique period in Earth history

  Cover caption: Jujuyaspis keideli, Kobayashi 1936, from the locality at Purmamarca in the Quebrada de Humahuaca, Jujuy province (Purmamarca shales, Lowermost Tremadocian) and Rhabdinopora flabelliformis acenolazai, Gutiérrez-Marco and Esteban 2005, from the Famatina Range of la Rioja province (Tremadocian, Peña Negra Member of Volcancito Formation). Jujuyaspis and Rhabdinopora are worldwide reference genus of the Lowermost Ordovician, whereas the figured species charaterize the Lowermost Ordovician in NW Argentina.

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  Vol. 3 No. 3 (2005)

  Cover caption: Partially inverted Triassic extensional fault at Sierra Vaquillas, Andrean Pre-cordillera (Northern Chile). The west-verging tight anticline developed in the hanging-wall, reflects a younger reverse sense of movement of the fault during the subsequent inversion. Car length: 5m.

  Author: A. Amilibia.

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  Vol. 3 No. 2 (2005): New insights into the Jurassic record of South America (Andes and Patagonia)

  Cover caption: Bajocian marine beds at the Paso del Espinacito (4476 m) with the Cerro Aconcagua (6959 m) in the background.

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  Vol. 3 No. 1 (2005)

  Cover caption: Some hopeite (Zn₃(PO₄)₂x4H₂O) crystals precipitated on a fish bone apatite grain due to a dissolution of the apatite particles in Zn-rich water at mildly acidic pH. This image is 500µ length.

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  Vol. 2 No. 4 (2004): Sedimentology, diagenesis and modelling of carbonate, evaporite siliclastic rocks: dedicated to Francesc Calvet

  Cover caption: 38,000years old eolianites, studied by Francesc Calvet in his PhD Thesis. S'Estret des Temps, North of Cala Figuera, Mallorca.

  Author: R. Salos. 

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  Vol. 2 No. 3 (2004)

  Cover caption: Parinacota volcanic cone (6,110m of altitude) nearby Chungará Lake, Northern Chile Altiplano, 18º15'/69º10'.

  Author: A. Sáez.

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  Vol. 2 No. 2 (2004): Hydrological Research in Earth Sciences: Trends and chalenges for the XXI Century

  Cover caption: Vallcebre stram (Berguedà, Catalonia, Spain). Vène river (Hérault, Languedoc, France).

  Author: F. Gallart.

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  Vol. 2 No. 1 (2004): The ambers of France Geology and state of the art of their palaeoentomological content

  Cover caption: Hymenoptera scelionidae from the Lower Cretaceous amber of Charente-Maritime (left) and from the Eocene amber of Oise (right).

  Originals: V. Perrichot and A. Nel, respectively.

  Design: P. Agulló.

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  Vol. 1 No. 4 (2003)

  Cover caption: Thomsonia sp. (left) and Atopochara trivolvis (right), a selaginellacean megaspore and a clavatoracean utricle (both 0.5mm across) from lacustrine sediments of the Lower Cretaceous of Spain.

  Design: Pep Agulló.

  The background is modified from the reconstruction of a Lower Cretaceous lake exposed in the Museo de Cuenca and designed by Raul Martin.

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  Vol. 1 No. 3 (2003)

  Cover caption: Badlands in the volcano-sedimentary rocks of the Furnace Creek Formation (Death Valley, California, USA).

  Author: Pere Santanach, March 1993. Photo taken from Zabriski Point.

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  Vol. 1 No. 2 (2003): New Advances in Eocene Biostratigraphy (IGCP Project nº 393). A contribution from the Southeastern Pyrenean Foreland Bas

  Cover caption: General view of the Lutetian sequences in the Tavertet cliffs (Ebro Basin, NE Spain).  
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  Vol. 1 No. 1 (2003): Advances in the knowledge of the Cambrian System

  Cover caption: Cephalons of some Agnostoid species that characterize the lower boundaries of three Cambrian stages of South China. From left to right:
     Ptychagnostus punctuosus (Angelin) for the lower boundary of the Wangcunian (x30.4);
     Linguagnostus reconditus Poletaeva and Romanenko which characterizes the Youshuian (28.5);
     Glyptagnostus reticulatus (Angelin) which defines the lower boundary of the Waergangian (x11.4).

  See paper by S. Peng in this issue.

• Acta Geologica Hispanica

  Acta Geologica Hispanica