Results 1 to 10 of about 2,620 (191)
Development of a quartz-based geothermometer for biogenic chert [PDF]
Scientific ReportsIn the accretionary complexes of areas where erosion is inactive, only biogenic chert is sometimes exposed and estimating diagenetic/metamorphic temperature in such areas is nearly impossible. We investigated the correlation of quartz crystallinity (CI),
Haruka Tanaka +3 more
doaj +2 more sources
Current Biology, 2019 In 1912, William Mackie, a medical practitioner surveying the regional geology west of Aberdeen, Scotland, happened on some unusual rocks (Figure 1) near the village of Rhynie. Dark gray to nearly black and shot through with cylindrical structures a few millimeters in diameter, these rocks differed markedly from the shales and volcanic rocks of local ...
Strullu-Derrien, Christine +2 more
openaire +2 more sources
Connecting chert sources of Sicily with Neolithic chert artefacts of Malta [PDF]
Journal of Archaeological Science: Reports, 2020 This article presents the results of a provenance study between late-Neolithic chert artefacts from Malta and chert sources of Sicily. It is part of a larger geoarchaeological research dedicated to investigate whether the cherts used for stone artefacts represent indigenous exploitation or results from longer-distance networks.
P. Chatzimpaloglou +3 more
openaire +2 more sources
Ilmu Pertanian (Agricultural Science), 2019 Understanding the nature of the soil is very important to know the potential and the proper management of the soil. This study aimed to determine the differences in morphological, physical, and chemical properties of the soils developing from gabbro ...
Ratna Taher, Makruf Nurudin, Eko Hanudin
doaj +1 more source
Shikarpur lithic assemblage: New questions regarding Rohri chert blade production
Journal of Lithic Studies, 2014 Recent excavations at Shikarpur, a fortified Harappan site situated near the Gulf of Kuchchh in Gujarat, Western India, brought to light a large collection of Rohri chert blades.
Charusmita Gadekar +2 more
doaj +1 more source
MINERALOGY, GEOCHEMISTRY AND ORIGIN OF CRETACEOUS CHERT FROM WADI AL-WALA, CENTRAL JORDAN
Iraqi Geological Journal, 2019 This research is aimed at detailed investigation of the origin chert rocks in Wadi Al-Wala area in central Jordan. The chert in the area is of Upper Cretaceous in age and belongs to the widely distributed chert on the western margin of the ...
Hassan Al-Fugha, Ahmad Al-Malabeh
doaj +1 more source
Journal of Materials Research and Technology, 2019 Cherty rocks, most abundant byproduct of mining industry, were used as adsorbent for the extraction of rare earth elements. Purified chert was characterized by various analytical methods (XRD, FX-ED, MEB, FTIR, laser granulometry).
Imen Bouchmila +3 more
doaj +1 more source
Microfossil-like tourmaline microlites in early Proterozoic nodular chert at Kiihtelysvaara, eastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1992 Many Proterozoic silicified sedimentary carbonates have been reported to contain remains of early micro-organisms. One of these localities in the Fennoscandian Shield is the village of Hyypiä at Kiihtelysvaara in eastern Finland, where a nodular chert ...
J. Karhu, H. O'Brien
doaj +1 more source
Journal of Lithic Studies, 2016 This work provides the keys to the mineralogical and geochemical characterization of black chert from the Vegamián Fm. This formation crops out throughout the whole of the Cantabrian Zone (of Palaeozoic age), one of the geological zones of the Cantabrian
Diego Herrero-Alonso +3 more
doaj +1 more source
The chert quarrying and processing industry at the Piatra Tomii site, Romania
Journal of Lithic Studies, 2015 Fieldwalking surveys in 2007 and 2008 revealed a moderate sized settlement on Piatra Tomii Hill (Alba County, Romania) which was considered of interest because of its location on top of a natural source of chert, and the large amount of chert artefacts ...
Otis Norman Crandell, Cristian Ioan Popa
doaj +1 more source