Petrology and Mineral Compositions: The fresh, pale gray interior of this specimen has multiple shock fractures (with very minor calcite coatings) and some thin glass veinlets (Figure 2). This rock is a poikiloblastic recrystallized breccia, with larger grains of plagioclase (~70%) enclosing much smaller grains (less than 100 microns across) of pyroxene (~20%), olivine (~10%) and accessory Ti-c...

The 1.88 km diameter Lonar impact crater formed 570 ka ago and is an almost circular depression hosted entirely in the Poladpur suite of the 65 Ma old basalts of the Deccan Traps. To understand the effects of impact cratering on basaltic targets, commonly found on the surfaces of inner Solar System planetary bodies, major and trace element concentrations as well as Nd and Sr isotopic compositio...

Clastic soil is ubiquitous in practice but still poses a challenge for testing and modelling. Conventional laboratory tests with small sizes are not suitable the large grain size, while large-scale field often too costly time-consuming. In this paper, mechanical behaviour of clastic described by hypoplastic constitutive model based on numerical simulations considering both matrix breccia. The i...

An exceptional exposure of volcaniclastic breccia intercalated with radiolarian cherts and limestones was studied which constitutes a unique block within the Upper Cretaceous Mamonia Mélange in Akamas Peninsula southwestern Cyprus. This breccia, represents lower part sedimentary cover Triassic Phasoula Formation volcanics. The mainly consists clasts metabasalts, diabases, metagabbros, hyaloclas...

J. McCoy, R. C. Greenwood, and I. A. Franchi. University of Arizona, Lunar and Planetary Laboratory (LPL), Tucson, AZ 85721, USA, ([email protected]), Dept. Physical Sciences, Kingsborough Community College of the City University of New York, 2001 Oriental Blvd., Brooklyn N.Y. 100235, USA, and the Dept. of Earth and Environmental Sciences, The Graduate Center of CUNY, Dept. Earth and Pla...

Detailed work on Quaternary volcanism has been carried out in the Mermoz and Fann sectors of western Senegal. In sector, main emission zone is a collapsed crater located at intersection three major fractures: NE-SW, NW-SE N-S. The lithological succession this sector comprises, from bottom to top: 1) substratum with its base Eocene limestones which lie sands surmounted by stratified tuffs; 2) ve...

Introduction: Impact-generated hydrothermal systems are often suggested as suitable habitats for primitive life [1,2], but fossil evidence of such colonization are rarely reported in the literature. Here, we report on the occurrence of putative microfossils in a hydrothermal system of the Dellen impact structure, Sweden. Impact-induced hydrothermal systems: Impacts in water-bearing targets can ...

Introduction: Individual grains and small lithic clasts in thin-sectioned suevitic breccia samples from the International Continental Scientific Drilling Program (ICDP) Bosumtwi impact crater drillcore LB07A were examined petrographically to evaluate the occurrence , abundance, and characteristics of unshocked and shock-metamorphosed quartz. The analyzed samples were taken across a ~42-m-long (...

Early beginnings of the Middle Triassic extension in areas surrounding western embayment Neotethys are evidenced formation small half-graben basins, local emergences underlying platform, and/or deposition coarse-grained breccia. The succession related to creation and infilling one these half-grabens is exposed on slopes base Mt. Vernar eastern Julian Alps, Slovenia. lowermost unit within Uggowi...