Results 211 to 220 of about 1,016,504 (237)

Models of miocene marginal lacustrine sedimentation in response to varied depositional regimes and source areas in the Madrid Basin (Central Spain)

Palaeogeography, Palaeoclimatology, Palaeoecology, 1989
J. Calvo, A. M. A. Zarza, M. A. G. D. Cura   +2 more
semanticscholar   +3 more sources

Saponitic clays from the Madrid basin: Accessory-minerals influence in hydrothermal reactivity

Applied Clay Science, 1992
Abstract Some hydrothermal alteration tests have been carried out on two selected clays which contain saponite as major component with illite or sepiolite representing the main accessory minerals in the bulk composition of saponitic clays. Both samples show an important increment of silica in solution and in removable amorphous silica when ...
J. Cuevas, J.A. Medina, S. Leguey
openaire   +1 more source

Gravity Modelling - a Contribution to the Knowledge of Madrid Basin Structure (Spain)

Proceedings, 1995
The Bouguer anomaly pattern reflects the density variations of the crust due to the different forming rocks and geometry. Gravity procedures make possible to model the structure of the crust. In these procedures several limitations must be taken into account to start with, of geological nature ( geological mapping, structural data, boreholes,..
J. F. Bergamin, R. Tejero
openaire   +1 more source

3D soft‐sediment deformation structures: evidence for Quaternary seismicity in the Madrid basin, Spain

Terra Nova, 1997
ABSTRACTThree‐dimensional patterns of soft‐sediment deformation, affecting middle Pleistocene fluvial deposits in the Lower Manzanares Valley (SW Madrid City), are reported. They promote a small‐scale hummocky topography, defined by different‐sized domes, mud volcanoes, wavy ridges and fissures on an ancient flood plain surface.
Pablo G. Silva, Juan C. Cañaveras, Sergio Sanchez‐Moral, Javier Lario, Enrique Sanz   +4 more
openaire   +2 more sources

Pseudospherulitic fibrous calcite in paleo-groundwater, unconformity-related diagenetic carbonates (Paleocene of the Ager Basin and Miocene of the Madrid Basin, Spain)

Journal of Sedimentary Research, 1999
ABSTRACT Massive, decimeter-thick intervals formed by mosaics of subspherical calcite crystals displaying an intracrystalline fibrous microfabric have been found in Paleocene and Miocene strata in Spain. The fibrous microfabric is marked by inclusion-defined fibers that radiate from the central parts of the crystals, which can be termed ...
C. Rossi, J. C. Canaveras
openaire   +2 more sources

Comparison of different interpolation techniques for sub-basins located in Madrid.

Soil hydrophysical properties can be very spatially and temporally heterogeneous even in small areas. Due to this spatial and temporal variability, it is impossible to obtain real data for each point of interest. Therefore, the possibility to obtain the optimal estimated value, at any desired point, is decisive. The aim is to evaluate different methods
Blanca Cuevas, Elena Pascual, Carlota Bernal, Sergio Zubelzu   +3 more
openaire   +1 more source

Taphonomic analysis of Batallones-10, a Late Miocene drought-induced mammalian assemblage (Madrid basin, Spain) within the Cerro de los Batallones complex

, 2021
D. Martín‐Perea, J. Morales, Enrique Cantero, L. Courtenay, Manuel Hernández Fernández, M. Domingo   +5 more
semanticscholar   +1 more source

The New Madrid Rift System — Its Role in the Evolution of the Illinois Basin

1995
The New Madrid Rift System, underlying the Mississippi Embayment and the southern end of the Illinois Basin, consists of the Reelfoot Rift and a dog-leg extension in western Kentucky known as the Rough Creek Graben. Seismic reflection sections indicate that the rift system consists of several half-grabens linked by accommodation zones much like those ...
Dennis R. Kolata, W. John Nelson
openaire   +1 more source

Quaternary intraplate surface uplift and opening of the Cenozoic Madrid Basin (Central Iberia)

The Central Range, the Iberian Chain and the Toledo Mountains in central Iberia were built during the Paleogene and Neogene alpine deformation, in response to shortening and thickening of the crust. The Cenozoic Madrid Basin in central Iberia was filled under endorheic conditions, fed by clastic sediments supplied from these mountains.
Manuel Montes, Julien Babault, Elisabet Beamud, Miguel Garcés, Aratz Beranoaguirre, Pablo Pelaez-Campomanes   +5 more
openaire   +1 more source

Structure and Tertiary evolution of the Madrid basin

1996
G. De Vicente, J.M. González-Casado, A. Muñoz-Martín, J. Giner, M.A. Rodríguez-Pascua   +4 more
openaire   +1 more source