The Bundelkhand-Aravalli craton is the most important lithotectonic unit in the central and western India where Paleoproterozoic Aravalli Supracrustal sequence has been deposited over an Archaean basement, the latter also known as the Banded Gneiss Complex (BGC). A NE-trending linear metasedimentary sequence, designated as the Jahazpur Belt occurs along the eastern fringe of the Aravalli Superg...

This study concerns the lithologic characteristics of stone used as main construction materials ancient Korean tombs, and aims to understand how they were supplied. Specifically, we investigated tombs in Songpa district, south Hangang River Seoul, composing connected stone-mound Seokchon-dong tomb complex, Bangi-dong No. 3, 13 horizontal stone-chamber Gamil-dong complex. There are major differe...

In the Western Gneiss Region in Norway, mafic eclogites form lenses within granitoid orthogneiss and contain best record of pressure temperature evolution this ultrahigh-pressure (UHP) terrane. Their exhumation from UHP conditions has been extensively studied, but their prograde rarely quantified although it represents a key constraint for tectonic history area. This study focused on well-prese...

We provide a test for recent arguments that the West Antarctic Ice Sheet (WAIS) is underlain by an extensive outcrop of volcanic rock (mainly basalt) examining non-clay and clay mineral composition sediments collected in front under Ross Shelf. If proposed large volume were present, then we posit glacial erosion transport would deliver to Sea enriched minerals diagnostic alkaline basalt, namely...

Samuel A. Bowring and Todd Housh (1) report Sm/Nd isotopic data giving a wide range of initial ENd values, from +3.5 to -4 at 4.0 billion years ago (Ga) and from +4 to -7 at 3.6 Ga. Their samples were from the Acasta gneisses of northern Canada, which represent the oldest known outcrops of continental crust (2). Their modeling of the Sm-Nd isotopic data is taken to suggest that the Acasta grani...

We report the first U–Th–Pb ion microprobe depth profiles of four Hadean zircons from the Jack Hills and Mount Narryer supracrustal belts of the Narryer Gneiss Complex (NGC), Western Australia. This ultra-high spatial resolution technique probes the age and origin of sub-micron features in individual crystals that can record episodes of zircon growth. Near-surface grain dates of 2700 Ma or olde...

Purpose. Determination of the rocks used for building 4th millennium BCE megalithic construction in Novooleksandrivka (Dnipropetrovsk Oblast, Ukraine) as well establishing places their probable provenance. Methodology. The study was performed using method comparative mineralogical and petrographic analysis thin sections stone from outcrops valleys rivers Mokra Sura Dnipro. chemical composition ...