...J. AROSTEGUI; F. J. SANGÜESA; F. NIETO; J. A. URIARTE Abstract Diagenesis in the Cretaceous and Tertiary sediments of the Alava Block (Basque-Cantabrian basin) has been studied using the clay mineralogy (X-ray diffraction) of cuttings from three representative wells of a N–S cross-section. More...

...F. J. SANGÜESA; J. AROSTEGUI; I. SUAREZ-RUIZ Abstract Lower Cretaceous clay minerals suites of the Alava Block, analysed by XRD, are dominated either by illite or kaolinite. These assemblages are mainly inherited in origin, although textural evidence (SEM) indicates some diagenetic clay...

... are the result of inheritance from soils and sediments subjected to a tropical or subtropical climate. The presence of kaolinite in Lower Cretaceous materials of Alava Block, Spain is also attributed to inheritance from soils developed on rocks in the source area ( Sanguesa et al. , 2000 ). On the origin...

.... For the CLSM study, the polished blocks of amber were mounted on microscope slides using double-sided adhesive tape, and observed using a LSM 310 Zeiss confocal microscope with a Plan-Apochromat 63×/1.40 oil immersion objective. An argon (488 nm) and helium/neon (543 nm) laser were used to generate...

... significantly from those of other neritimorph clades, including Neritopsidae Gray, 1847 and Neritiliidae Schepman, 1908 . Matrix block NHMM S/ENM 11.1999 (Natuurhistorisch Museum Maastricht collections, leg. J. Severijns) contains two specimens of O. retzii , both exposed with apertures facing...

... (Iberian Peninsula) based on illite-smectite distribution . Clay Minerals , 26 , 535 – 548 . Aróstegui J. Sanguesa F.J. Nieto F. Uriarte J.A. ( 2006 ) Thermal models and clay diagenesis in the Tertiary-Cretaceous sediments of the Alava Block (Basque-Cantabrian basin, Spain...

... representatives of Bothremydini (“ Bothremys group”) appeared in the Mediterranean Tethys area and then dispersed from Europe to eastern North America during the Late Cretaceous. F ig . 3. – Schematic map showing the relationships of Europe with other continental blocks during the Late Cretaceous...

... with Eocene forearc deposition, and syndepositional DZ is used to revise maximum depositional age for the upper Eocene Helico Member and Verdun Formation. Progressive subsidence and arc shut-down in the late Eocene coincide with arc collision to the north, uplift of the Amotape block, subduction erosion...

... diagenesis in the Tertiary-Cretaceous sediments of the Alava block (Basque-Cantabrian basin, Spain) . Clay Minerals , 41 , 791 – 809 . Behrens M. & Siehl A. ( 1982 ) Sedimentation in the Atlas Gulf I: Lower Cretaceous clastics . Pp. 427 – 439 in: Geology of the Northwest African...

... of mantle-derived mafic magmas and coeval crustal melts are associated with crustal extension and block faulting. The Coast Mountains orogen, which lies along the Pacific coast of British Columbia and southeastern Alaska, has been the locus of significant Mesozoic and younger igneous activity. This orogen...

... ; field location shown in Shanmugam et al., 2000 , figure 1). The tectonic pulses were probably compressive ( Balkwill et al., 1995 ) or transpressive ( Baby et al., 1998 ), causing subtle basement-block uplifts in an "embryonic foreland basin" ( Balkwill et al., 1995 , p. 568), related to eastward...

... located on the margins of the platform. Phosphatic deposits coming from the leaching of the emerged blocks were concentrated in sandbars offshore [ Bandel and Mirkel, 1985 ]. As for major oyster bioherms that punctuate the phosphatic series, they were probably developed in this shallow marine environment...

... Sebastian; B: Baiona; S: Santander; Bu: Burgos; L: Logroño; P: Iruñea-Pamplona. A fast acceleration of rifting in the interval from Late Aptian to Late Albian originated uplifted blocks with shallow marine rimmed carbonate platforms, transitional to deltaic and deeper marine siliciclastic areas...

..., Palaeoecology 40 , 167 – 81 . Sangüesa FJ , Arostegui J and Suarez-Ruiz I ( 2000 ) Distribution and origin of clay minerals in the Lower Cretaceous of the Alava Block (Basque-Cantabrian Basin, Spain) . Clay Minerals 35 , 393 – 410 . Santander J , Sopelana...

... Albian to Early Cenomanian; Pérez García et al., 1997 ), developed in an area of around 1,500 km 2 at the southern margin of the basin, extending to the Álava, Vizcaya, and Burgos Provinces ( Fig. 1 ). Its thickness reaches 5,000 m (Ente Vasco de la Energia, 1994) with an average total organic carbon...

... sandstone 40 mi off the English coast in Block 48/6, in the West Sole field, another and apparently larger discovery, the Leman field, was made in the same formation 60 mi southeast and 30 mi offshore in Block 49/26. Another significant discovery was the Hewett field, 15 mi west of Leman in Block 48/29...