 | | Journal (article/letter/editorial) | | Tahtayayla rhyolite-obsidian flow, Hasandag (Aksaray) volcanites, Central Turkey M. Arslan Dept. of...University, Trabzon, Turkey H. Kurt Dept. of Geology, Selguk University, Konya, Turkey Dept. of Geology...Geology, Ankara University, Ankara, Turkey Y. K. Kadioglu The Hasandag (Aksaray) area in Central Anatolia...in Quaternary (e.g. Ercan, 1987). Rhyolite and obsidian observed at around Tahtayayla area in the northeast...Quaternary (Ercan et al., 1989). The rhyolite and obsidian are characterised by a wide range of surface structure |  | | Report (issue) | | on the flank of an ancient volcano known as the Turkey Creek caldera. 2) This volcano produced giant explosive...are by examining ancient analogues such as the Turkey Creek caldera that have been dissected by erosion...is on the flank of a giant volcano known as the Turkey Creek caldera. This volcano erupted 27 million...small by comparison. Other giant volcanoes like the Turkey Creek caldera are present in many parts of the...the processes that led to the development of the Turkey Creek caldera and the surrounding landscape. 1 |  | | Journal (article/letter/editorial) | | glass for our purpose. When we measured one of our obsidian samples, we found that Ne was highly enriched...gases from SAMPLES We used the obsidian samples obtained from Turkey, the U.S., and Japan (Table I)....Nemrut, and sample ME1 is from Mt. Meydan in eastern Turkey. Both mountains are young Quarternary volcanoes...samples when he went to Turkey for a geochemical research program between Japan and Turkey. Preliminary results...the K-Ar ages of NE2 and ME 1 are less than 1 Ma Obsidian samples US1 15, US330a, and US1823 from the U |  | | Journal (article/letter/editorial) | | glasses, we measured noble gas concentrations in obsidian samples which were degassed in a vacuum at 800°C...concentrations in five size-separated fractions of the obsidian (ME1) (>250, 149-250, 74-149, 46-74 and <46 pm...gradual decrease with decreasing grain size of the obsidian samples. For the tektite samples, Ne concentration...1993), impact glasses (Matsubara et al., 1991) and obsidian (Miura and Nagao, 1991). This sug gests that the...results, we made a laboratory experi ment using obsidian and tektite samples. The ob sidian samples which |  | | Journal (article/letter/editorial) | | to blackish basalt. More about the fake "red obsidian" Editor R & M: Reference letter in the March-April..."red obsidian". It was given to me by a friend who like Mr. Gordon, doesn't think it is obsidian, and...seen red obsidian, but only as dark red streaks in the customary and typical black obsidian, while the...rate, on my first view of this controversial "red obsidian" my first thought was "glass factory waste". Dorr...N . Mex. May 9, 1955 Beach sand from Definge, Turkey Walter McNamara, 7 Harmony St., Danbury, Conn. |  | Siebel, W., Schmitt, A. K., Kiemele, E., Danišík, M., Aydin, F. (2011) Acigöl rhyolite field, central Anatolia (part II): geochemical and isotopic (Sr–Nd–Pb, δ18O) constraints on volcanism involving two high-silica rhyolite suites. Contributions to Mineralogy and Petrology, 162 (6) 1233-1247 doi:10.1007/s00410-011-0651-2 | Journal (article/letter/editorial) | | Cappadocian Volcanic Province of central Anatolia, Turkey. It comprises two sequences of domes and pyroclastic...Engineering, Karadeniz Technical University, Trabzon, Turkey rhyolites are enriched in d18O by *0.5%, consistent...Cappadocian Volcanic Province (CVP) of central Anatolia (Turkey). Although the Acigöl field is dominated by high-silica...Upper Acigöl tuff (UAT; *15 km3). Rhyolite and obsidian flows in the eastern part of Acigöl (Bogazköy...Location of the Cappadocian Volcanic Province (CVP) in Turkey and b sketch map of the study area (redrawn from |  | | Book | | sidi0000unse ADVANCES IN OBSIDIAN GLASS STUDIES ADVANCES IN OBSIDIAN GLASS STUDIES Archaeological...Publication Data Main entry under t itle: Advances in obsidian glass studies. Bibliography : p. 1ndudes index...and Rainer Berger ~ J;!rdration Rate Studies (V Obsidian Hydration Rate Determinations on Chemically Characterized...Kimberlin 5. Intrinsic Hydration Rate Dating of Obsidian .................................. 81 Wallace...Wallace Ambrose 6. Empirical Determination of Obsidian Hydration Rates from Archaeological Evidence ....... |  | | Journal (article/letter/editorial) | | feet. Since all my sacks were filled with scoria, obsidian, and stuff like that, I filled my jacket pocket...to blackish basalt. More about the fake "red obsidian" Editor R & M: Reference letter in the March-April..."red obsidian". It was given to me by a friend who like Mr. Gordon, doesn't think it is obsidian, and...seen red obsidian, but only as dark red streaks in the customary and typical black obsidian, while the...rate, on my first view of this controversial "red obsidian" my first thought was "glass factory waste". Dorr |  | | Journal (article/letter/editorial) | | silicic volcanism of the Çubukludağ Graben, western Turkey: an example of generation of pyroclastic density...Mines, Geology Department, Maslak Istanbul 34469, Turkey (Received 9 October 2012; accepted 9 May 2013;...pyroclastic density current, silicic dome, Western Turkey. 1. Introduction Silicic magmatism is often associated...İzmir and Kuşadası regions in Western Anatolia (Turkey). It lies between the Aegean coastline in the south...and contains abundant different-sized rhyolite, obsidian and perlite fragments. A white-coloured matrix |  | | Journal (article/letter/editorial) | | Accepted 6 October 2011 Keywords: Natural glass Obsidian Perlite Pitchstone Impactite Tektite Frictionite...Heide / Chemie der Erde 71 (2011) 305–335 2.1. Obsidian and pumice . . . . . . . . . . . . . . . . . ...produce tools and weapons. Natural glasses such as obsidian, the most frequent vitreous material on the earth’s...of weapons, decoration and mirrors. The use of obsidian determined the development of ancient civilizations...spanned trade in obsidian (e.g. Rapp, 2002, p. 79). The conchoidal fracture of obsidian allows for the |  | | Report (issue) | | Table 5 Anhydrous norm of Sandy Braes porphyritic obsidian 9 Table 6 Chemical analyses of Scottish pitchstones...Table 11 United Kingdo.m: imports of perlite, obsidian and pitchstone, by countries, 1970-1976 23 Table...Table 12 United Kingdom: exports of perlite, obsidian and pitchstone 1970-197 6 23 Table 13 United...classification of crude perHte is by water content, with obsidian containing less than four per cent combined water...Romberg, working in Gennany, in 1936, smelted obsidian in a shaft furnace to produce a frothy slag which |  | Schmitt, Axel K., Danišík, Martin, Evans, Noreen J., Siebel, Wolfgang, Kiemele, Elena, Aydin, Faruk, Harvey, Janet C. (2011) Acigöl rhyolite field, Central Anatolia (part 1): high-resolution dating of eruption episodes and zircon growth rates. Contributions to Mineralogy and Petrology, 162 (6) 1215-1231 doi:10.1007/s00410-011-0648-x | Journal (article/letter/editorial) | | from the Acigöl rhyolite field (Central Anatolia, Turkey), which is part of a Quaternary bimodal volcanic...Karadeniz Technical University, 61010 Campus Trabzon, Turkey J. C. Harvey Geological and Planetary Sciences...Acigöl complex in Cappadocia (Central Anatolia, Turkey; Fig. 1; see also Siebel et al. 2011). Unlike many...PLAT E 40°N Fig. 1 Neotectonic overview map of Turkey with the location of the Cappadocian Volcanic Province...Crystalline Complex (CACC), a major tectonic unit of Turkey (Dilek and Sandvol 2009; Gautier et al. 2008; Göncüoğlu |  | | Journal (article/letter/editorial) | | Plateau): The most recent post-collisional volcanism in Turkey Yavuz Özdemir a,1, Özgür Karaoğlu b,2, Arif...Ankara, Turkey b Department of Geological Engineering, Dokuz Eylül University, 35100 Izmir, Turkey c Department...Engineering, Yüzüncü YV l University, 65080 Van, Turkey Accepted 5 September 2005 Abstract The Nemrut...bottom of the wall is marked by a 75–150 m thick obsidian flow, overlain by trachytic lavas up to 500–550...area of about 17 km2. Above these, lies another obsidian flow bearing sanidine phenocrysts 1–2 cm in size |  | | Journal (article/letter/editorial) | | perspective of glass-chemical experience with obsidian glasses. From the point of view of glass technology...micrographs con8rm the di7erent thermal history of obsidian and tektite glasses. Also on this basis, a volcanic...BouKska, 1993). d Georgiaites and Bediasites. e Obsidian deposits of the following regions have been analyzed:...Oregon, Nevada, Armenia, Macusani=Peru, Sardinia, Turkey, Milos and Giali=Greece. The highest and lowest...di7erent aspects of the chemistry of tektite and obsidian melts, one must consider that small chemical di7erences |  | | Report (chapter) | | Engineering Faculty, Osmangazi University, Eskisehir, Turkey *Corresponding author (e-mail: aurelia.ferrari@oma...the North Anatolian Fault eastern termination in Turkey, together with previous studies, put strong constraints...East Anatolian Fault because its volcanism was an obsidian source during prehistoric time (Chataigner et...1969). Approximating the behavior of the eastern Turkey continental lithosphere like an oceanic one though...2004). Finally, like oceanic lithosphere eastern Turkey has an anomalously thin (60 to 80 km) Table 1 |  | Imamverdiyev, N.A., Gasangulieva, M.Ya., Babaeva, G.J., Abdullaeva, Sh.F., Veliev, A.A. (2018) Petrogenesis of the Late Cenozoic collision volcanism in the central part of the Lesser Caucasus (Azerbaijan) Russian Geology and Geophysics, 59 (1) 41-54 doi:10.1016/j.rgg.2018.01.003 | Journal (article/letter/editorial) | | The Late Miocene–Quaternary volcanic rocks in the Turkey–Iran Plateau and the Lesser Caucasus are calc-alkalic...and trachyandesites; 3, rhyolites, perlite, and obsidian; 4, andesites, dacites, rhyodacites, and rhyolites;...alternating black turbid obsidian and trachyrhyolite . . . . . 35 2. Black turbid obsidian . . . . . . . . ....Rhyolite tuffs with autobreccias of black lustrous obsidian (40 m). On the NE and SE mountain spurs they are...are overlain by spheroid lustrous obsidian . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |  | Özdemir, Yavuz, Karaoğlu, Özgür, Tolluoğlu, Arif Ümit, Güleç, Nilgün (2007) Reply to discussion by Evren Çubukçu, Erkan Aydar and Alain Gourgaud of “Volcanostratigraphy and petrogenesis of the Nemrut stratovolcano (East Anatolian High Plateau): The most recent post-collisional volcanism in Turkey” by Y. Özdemir, Ö. Karaoğlu, A.Ü. Tolluoğlu and N. Güleç [Chemical Geology 226 (2006) 189–211]. Chemical Geology, 245 (1) 130-134 doi:10.1016/j.chemgeo.2007.07.009 | Journal (article/letter/editorial) | | Plateau): The most recent post-collisional volcanism in Turkey” by Y. Özdemir, Ö. Karaoğlu, A.Ü. Tolluoğlu and...Ankara, Turkey b Departmant of Geological Engineering, Dokuz Eylül University, 35100 Izmir, Turkey c Department...Engineering, Yüzüncü Yıl University, 65080 Van, Turkey Received 25 June 2007; accepted 7 July 2007 Editor:...Plateau): the most recent post-collisional volcanism in Turkey” (Özdemir et al., 2006), we attempted to reconstruct...of one of the most important stratovolcanoes in Turkey through a detailed geological mapping, backed up |  | Innocenti, F., Mazzuoli, R., Pasquarè, G., Radicati Di Brozolo, F., Villari, L. (1982) Tertiary and quaternary volcanism of the Erzurumkars area (Eastern Turkey): Geochronological data and geodynamic evolution. Journal of Volcanology and Geothermal Research, 13 (3) 223-240 doi:10.1016/0377-0273(82)90052-x | Journal (article/letter/editorial) | | VOLCANISM OF THE ERZURUMK A R S A R E A (EASTERN TURKEY): G E O C H R O N O L O G I C A L D A T A AND GEODYNAMIC...Quaternary volcanism of the Erzurum-Kars area (Eastern Turkey): geochronological data and geodynamic evolution...products from the area of Erzurum and Kars (Eastern Turkey). The affinity of most of the volcanic rocks concerned...distributionof the calc-alkalinevolcanism in Eastern Turkey -- N W Iran is characterized by a sudden northward...Eurasia. INTRODUCTION The region comprising Eastern Turkey, NW Iran and Soviet Armenia was characterized by |  | | Journal (article/letter/editorial) | | was wrecked on the point over 100 years ago. o Obsidian sand from Black Sand Beach, Hawaii Father Felix...lustrous sand consisting entirely of black lustrous obsidian. "I think this sand should be very interesting...Quartz sand from Ephesus, Turkey Ephesus, now known as Ayasoluk, is in western Turkey about 36 miles south |  | | Report (issue) | | unit___________ Tuff unit of Hawk Canyon___ ______ Rhyolite-obsidian unit_______________ Quartz latite unit of Hawk...the Aravaipa Valley-Klondyke road at the mouth of Turkey Creek. Another rough jeep road extends from the...just northeast of the confluence of Aravaipa and Turkey Creeks, the Sanford Ranch on Old Deer Creek, and...Parsons, and Oak Grove Canyons, and the canyon of Turkey Creek. Farther south the Galiuro Mountains lose...watercourses, particularly Aravaipa Canyon and Turkey Creek, are large stands of cottonwood, sycamore |  | | Journal (article/letter/editorial) | | o f metallic iron. Specific gravity 2"24. ¢. Obsidian from New Zealand and Ascension.--These specimens...results obtained by Berthier in his examination o f obsidian from P a s c o in Columbia. 5. Mr. M u r d o c...: - I. The beak is stated to resemble that of a turkey, except in being rather more curved. Leguat's figure...Strickland on the former Existence o f t~e") than a turkey, while the Dodo was a very short-legged bird, as...said to be longer in proportion than that of a turkey. But the Dodo is depicted with a short, thick and |  | | Journal (article/letter/editorial) | | 43–49 DOI: 10.3190/jgeosci.086 Original paper Obsidian balls (marekanite) from Cerro Tijerina, central...volcanic glass in central Nicaragua. We investigated obsidian samples in perlite from a large profile of volcanic...in the vicinity of the town of Matagalpa. The obsidian occurs in the form of up to 3-cm dark-coloured...Microprobe analysis of the homogenous glass of obsidian balls and perlite has confirmed their subalkaline...2 mm) of the obsidian balls, reflecting changes in the H2O content. Keywords: obsidian, marekanite, |  | | Journal (article/letter/editorial) | | Quaternary Su«phan Stratovolcano, Eastern Anatolia, Turkey: Evidence for the Lithosphere^Asthenosphere Interaction...ENGINEERING, YUZUNCU YIL UNIVERSITY, 65080, VAN, TURKEY 2 DEPARTMENT OF GEOLOGICAL ENGINEERING, MIDDLE...MIDDLE EAST TECHNICAL UNIVERSITY, 06531 ANKARA, TURKEY RECEIVED JUNE 24, 2012; ACCEPTED SEPTEMBER 23, 2013...Engineering, Yuzuncu Y|l University, 65080, Van, Turkey. Telephone: (þ) 90 432 2251732. Fax: (þ) 90 432...avalanche, pyroclastic fall deposits and rhyolitic obsidian lava flows (Fig. 2). The debris avalanche deposits |  | | Book | | non-display collections, particularly in Greece, Turkey, Cyprus, Israel, Jordan, Egypt, Tunisia, North...the lithology of materials excavated in Greece, Turkey, Cyprus, Israel, Egypt, Tunisia, China, and North.... . . . . . . . . . . . . . . . . . . . . 4.4 Obsidian . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . 83 Major obsidian deposits of Europe . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . 86 Major obsidian deposits in Anatolia . . . . . . . . . . . . |  | | Book | | Mining in Europe ....... 66 Sources and Trading of Obsidian and Other Hard Stones . 108 Chronology and Customs...and weapons were flint, chert, igneous rocks and obsidian. A broad outline of the general methods employed...this theory. Joan Oates states that flint and obsidian tools found at Tepe Guran in the Zagros Mountains...must always prevail. 5 Sources and Trading of Obsidian and Other Hard Stones Although silex mining was...alternatives used were obsidian and special varieties of hard igneous and other rocks. Obsidian This variety of |
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Tatvan, Bitlis Province, Turkey