erna77fi)5, a unique achondrite found in the Allan Hills area, Antarctica, contains cumulus olivine and chromite phenocyrsts poikiliticaily enclosed by pyroxene and maskelynite. Petrofabric analysis on olivine shows a weak preferred orientaticin primarity consisting of a YZ foliation plane containing a weak [001] lineation. Secondary maxima are attributed to the development of exaggerated {ll0}...

Mineral chemistry, major and trace elements and Sr-Nd isotopes are presented for basalts and trachybasalts from the Quaternary alkaline Tepi shield from southwest Ethiopia. The lavas are variably porphyritic with phenocrysts of olivine (Fo67–87), clinopyroxene (Wo45–47En38–40Fs13–16), plagioclase (An57–68) and Ti-magnetite set in a microcrystalline matrix. Although there are two high-MgO lavas ...

Texture synthesis aims to define and reproduce discriminating image features. These features are used to associate with and differentiate between two textures. Often texture is composed of a pattern with an element of randomness in each feature’s appearance, position and orientation. The goal is to imitate the sample texture in such a way that sample and synthesised texture are perceived to be ...

Measured material representations like Bidirectional Texture Functions or Reflectance Fields offer very realistic appearance but the user is currently not capable of changing this appearance in an effective and intuitive way. Such editing operations would require a low-dimensional but expressive model for appearance that exposes only a small set of intuitively editable parameters (1D-sliders, 2...

Abstract Stromboli (Italy) is a basaltic volcano characterized by persistent, mild strombolian activity, occasionally interrupted lava effusion and more violent explosive events, named major explosions paroxysms depending on their intensity magnitude. The normal activity fed shallow degassed highly porphyritic (HP) shoshonitic basalt carrying about 50 vol.% crystals settled in glassy matrix (K ...

Introduction: The martian basaltic meteorites display enormous variation in their trace element and isotopic compositions. A subset of the shergottites including NWA1195, SaU005/008, DaG476, Y980459, Dhofar 019, and QUE94201 have many similar geochemical features, in addition to being the oldest shergottites. Strongly light-rare-earth element (LREE)-depleted REE patterns, low initial Sr and hig...