Results 21 to 30 of about 26,069 (224)

Emplacement of the Rocche Rosse rhyolite lava flow (Lipari, Aeolian Islands) [PDF]

open access: yes, 2018
The authors acknowledge Airbus Defence and Space for providing satellite imagery, financial support from Keele University and fieldwork grants from the Mineralogical Society of Great Britain and Ireland and the Volcanic and Magmatic Studies Group.
Bullock, Liam A   +2 more
core   +2 more sources

A New Aceramic Neolithic Site Nearby the Obsidian Sources: Preliminary Insights from Sırçalıtepe

open access: yesAnadolu Araştırmaları, 2021
This paper is a general assessment of the studies conducted in 2019 and 2020 at the site of Sırçalıtepe. The settlement, which is dated to the 8th mill BCE, is located in the Volcanic Cappadocia region, within the borders of the Kayırlı village in the ...
Semra Balcı   +5 more
doaj   +1 more source

Frequency Dependent Rheology of Vesicular Rhyolite [PDF]

open access: yes, 1993
Frequency dependent rheology of magmas may result from the presence of inclusions (bubbles, crystals) in the melt and/or from viscoelastic behavior of the melt itself.
Angell   +28 more
core   +1 more source

Characterization and Provenance of Archaeological Obsidian from Pirozza-Spalmatore, a Site of Neolithic Colonization on the Island of Ustica (Sicily)

open access: yesOpen Archaeology, 2019
This article presents the first archaeometric research carried out so far on a group of obsidian artifacts collected in the promontory of Pirozza-Spalmatore, the site of a Neolithic settlement on the small island of Ustica (Sicily, Italy).
Franco Foresta Martin, Tykot Robert H.
doaj   +1 more source

Volcanic eruptions from ghost magma chambers [PDF]

open access: yes, 2008
Recent studies have proposed that magma reservoirs crystallized to a virtually rigid crystal-mush can be partially remelted by diffusion of hot fluids. We show that for a crystal mush with the composition of a K-trachyte from the Campanian Ignimbrite (CI)
BATTAGLIA, MAURIZIO   +3 more
core   +1 more source

A Compositional Study (pXRF) of Early Holocene Obsidian Assemblages from Cyprus, Eastern Mediterranean

open access: yesOpen Archaeology, 2019
This paper presents the results of the geochemical characterisation of complete obsidian assemblages dating to the Early Aceramic Neolithic (8200–6900 Cal BC) and located in Cyprus, eastern Mediterranean.
Moutsiou Theodora
doaj   +1 more source

Analisis Teknologi Artefak Obsidian Danau Bandung Purba

open access: yesPubawidya: Jurnal Penelitian dan Pengembangan Arkeologi, 2012
. Stone tool's was one of a kind that prehistory man use and made, where is purpose or un purpose to help their daily life's. There's lot of stone material that man could use to make stone tool and one of them is Obsidian.
Anton Ferdianto
doaj   +1 more source

Two Acheuleans, two humankinds. From 1.5 to 0.85 Ma at Melka Kunture (Upper Awash, Ethiopian highlands) [PDF]

open access: yes, 2017
The Acheulean is the longest-lasting human cultural record, spanning approximately 1.5 Ma and three continents. The most comprehensive sequences are found in East Africa, where, in large-scale syntheses, the Lower Pleistocene Acheulean (LPA) has often ...
Gallotti, Rosalia, Mussi, Margherita
core   +1 more source

TECHNOLOGICAL EXPLORATION AND RITUAL USE OF OBSIDIAN IN ANCIENT CULTURES OF THE PACIFIC

open access: yesТеория и практика археологических исследований, 2022
The article examines a range of directions and current stage of obsidian studies within the Pacifi c basin such as (1) geochemistry, identifi cation of volcanic glass sources used in ancient cultures; (2) technology, obsidian exploration methods, their ...
А.В. Табарев   +2 more
doaj   +1 more source

Carbonic anhydrase 2-derived drug-responsive domain regulates membrane-bound cytokine expression and function in engineered T cells

open access: yesCommunications Biology
Adoptive cell therapies (ACT) have shown reduced efficacy against solid tumor malignancies compared to hematologic malignancies, partly due to the immunosuppressive nature of the tumor microenvironment (TME). ACT efficacy may be enhanced with pleiotropic
Mara C. Inniss   +17 more
doaj   +1 more source

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