Fig 4 - uploaded by Klaudia Hradil
Content may be subject to copyright.
a. Whitish blocks of silicate melt rock within an outcrop of a polymict breccia (see hammer for scale). b. Unprepared surface of the silicate melt rocks under the microscope. The tiny spheroids and lensshaped bodies which make up the rock become visible (field is about 8 mm wide). c. Twinned feldspar grain, included within the silicate melt rock, with one set of twinning lamellae being isotropic, typical for diaplectic crystals (crossed polarizers; field is about 1 mm wide). d. Thin section of the silicate melt rock shown in b (field is about 2 mm wide).

a. Whitish blocks of silicate melt rock within an outcrop of a polymict breccia (see hammer for scale). b. Unprepared surface of the silicate melt rocks under the microscope. The tiny spheroids and lensshaped bodies which make up the rock become visible (field is about 8 mm wide). c. Twinned feldspar grain, included within the silicate melt rock, with one set of twinning lamellae being isotropic, typical for diaplectic crystals (crossed polarizers; field is about 1 mm wide). d. Thin section of the silicate melt rock shown in b (field is about 2 mm wide).

Source publication
Article
Full-text available
The Rubielos de la Cérida impact structure forms a companion crater to the Late Eocene-Oligo-cene Azuara impact structure. Both are located more or less at the margin of the Iberian chains and the Ebro basin south of Zaragoza. Within the Rubielos structure, silicate melt rocks, carbonate-phosphate melts with small-scaled immiscibility features, ver...

Similar publications

Article
Full-text available
Olivine hornblendites (cortlandtites) form part of the Montnegre mafic complex related to late-Variscan I-type granitoids in the Catalan Coastal Ranges. Two generations of spinel are present in these hornblendites: Spl1 forms euhedral crystals included in both olivine and Spl2. Spl2 forms euhedral to anhedral crystals associated with phlogopite and...
Article
Full-text available
Experimental investigations and thermodynamic calculations of the phase relations of a cordierite-rich monzogranite from the Cabeza de Araya batholith (Cáceres, Spain) have been performed to understand the formation of cordierite. The experiments failed to crystallize cordierite in the pressure range 200-600MPa, in the temperature range 700-975ºC a...
Article
Full-text available
This study analyses the length and onset of the four seasons based on the annual climatic cycle of maximum and minimum temperatures. Previous studies focused over climatically homogeneous mid-high latitude areas, employing fixed temperature thresholds (related to climatic features such as freezing point) that can be inadequate when different climat...
Article
Full-text available
In this paper, the problem of flooding management at the Ebro River in Spain is presented. The Ebro river presents flooding episodes in the city of Zaragoza in spring when snow melts in the Pyrenees. To avoid flooding in living areas, some lands outside the city are prepared to be flooded. This paper presents a hybrid model predictive control appro...

Citations

... : Azuara impact structure located south of Zaragoza and north of the compagnion Rubielos de la Cérida impact structure [5,6,7] As shown by thin sections under the microscope, the vein consists of a light matrix of carbonate minerals, hosting a high amount of black spherical to amoeboidal particles which show gel-like layered structure in the reflective light. The rim towards the dolomite country rock is characterized by pure carbonate crystals having grown perpendicular to the vein´s wall. ...
Article
Full-text available
We use Schmieder and Kring's article to show how science still works within the so-called "impact community" and how scienti c data are manipulated and "rubber-stamped" by reviewers (here, e.g., C. Koeberl and G. Osinski). We accuse the authors of continuing to list the Azuara and Rubielos de la Cérida impact structures and one of the world's most prominent ejecta occurrences of the Pelarda Fm. in Spain 1 2 as non-existent in the compilation. The same applies to the spectacular Chiemgau impact in Germany, which has been proven by all impact criteria for several years. For the authors' dating list, we propose that the multiple impact of Azuara is included together with the crater chain of the Rubielos de la Cérida impact basin as a dated candidate for the third, so far undated impact markers in the Massignano outcrop in Italy.
Article
Full-text available
The Iberian System in NE Spain is characterized by a distinctive graben/basin system (Calatayud, Jiloca, Alfambra/Teruel), among others, which has received much attention and discussion in earlier and very recent geological literature. A completely different approach to the formation of this graben/basin system is provided by the impact crater chain of the Rubielos de la Cérida impact basin as part of the important Middle Tertiary Azuara impact event, which has been published for about 20 years. Although the Rubielos de la Cérida impact basin is characterized by all the geological, mineralogical and petrographical impact findings recognized in international impact research, it has completely been hushed up in the Spanish geological literature to this day. The article presented here uses the example of the Jiloca graben to show the absolute incompatibility of the previous geological concepts with the impact structures that can be observed in the Jiloca graben without much effort. Digital terrain modeling and aerial photography together with structural and stratigraphic alien geology define a new lateral Singra-Jiloca complex impact structure with central uplift and an inner ring, which is positioned exactly in the middle of the Jiloca graben. Unusual topographic structures at the rim and in the area of the inner ring are interpreted as strike-slip transpression and transtension. Geological literature that still sticks to the old ideas and develops new models and concepts for the graben/basin structures, but ignores the huge meteorite impact and does not even enter into a discussion, must at best cause incomprehension.
Book
Full-text available
Impact processes are among the most frequently occurring ones in the Solar System. The result of the collision on a solid surface is: crater. The book overview all aspects of crater formations on the solid bodies in the Solar System. It deals with the formation of the concepts, the development of methods which were used in extension of the stratigraphic principles to the Solar System bodies with solid surdace: planets, moons, smaller bodies. The book also analyses the processes of aging, weathering of the most spectacular planetary formations: the impact craters. Most of the book is written in Hungarian, however, several chapters have been translated to English.