Recent findings of evolved martian crustal materials by orbiters and rovers challenged the longstanding notion an only-tholeiitic basaltic crust. Models exploring intraplate magmatic processes like fractional crystallization show that unrealistic amounts solid accumulation are sometimes required for formation materials, including analyzed Curiosity rover at Gale crater. Assimilation (AFC) play ...

In the Ordovician limestone of Thorsberg quarry (South Sweden), about 130 meteorites have been found. Among extraterrestrial material, several terrestrial Cr-spinels and zircons found too. particular, in interval 416–447 cm above Arkeologen bed, Cr-spinels, compositionally different from previous studied same sequence, are present. Previous studies on zircon provided depositional ages that rang...

Many stone tools were found on a hill south of the Hor Al-Dalmaj which is located in central part alluvial plain Mesopotamia, between Tigris and Euphrates Rivers. The types rocks from studied made are not plain, because it consists friable sand, silt, clay. All existing sediments precipitated riverine environments such as point bar, over bank, floodplain sediments. collected described with magn...

Abstract In the present work we discuss results of a number Schmidt hammer tests (total impacts N > 2,400) that were performed in situ on rock outcrops different lithology (marl, calcareous marl, limestone, sandstone, quartz sandstone and rhyolite) occur Italy. Firstly, specific field procedure to choose reference value rebound index adopted calculate UCS intact is suggested. A relationship ...

We used a Hierarchical Neuro-Fuzzy Class Method based on binary space partitioning NFHBClass Method for macroscopic rock texture classification. The relevance of this study is in helping Geologists in the diagnosis and planning of oil reservoir exploration. The proposed method is capable of generating its own decision structure, with automatic extraction of fuzzy rules. These rules are linguist...

[1] A recent prospective on the Yellowstone Caldera discounts its explosive potential based on inferences from tomographic studies which suggests a high degree of crystallization of the underlying magma body. In this study, we show that many of the first teleseismic P-wave arrivals observed at seismic stations on the edge of the caldera did not travel through the magma body but have taken longe...