Journal of


  (Formerly Journal of the Czech Geological Society)

Original Paper

Štěpánka Mrázová, Petr Gadas

Obsidian balls (marekanite) from Cerro Tijerina, central Nicaragua: petrographic investigations

Journal of Geosciences, volume 56 (2011), issue 1, 43 - 49


  Abstract References Map

Denton JS, Tuffen H, Gilbert JS, Odling N (2009) The hydration and alteration of perlite and rhyolite, J Geol Soc, London 166: 895-904

Friedman L., Smith RL (1958) The deuterium content of water in some volcanic glasses. Geochim Cosmochim Acta 15: 218-228

Friedman I, Smith RL, Long WD (1966) Hydration of natural glass and formation of perlite. Geol Soc America Bull 77: 323-328[323:HONGAF]2.0.CO;2

Hradecký P, Mlčoch B, Mrázová Š, Rapprich V, Havlíček P, Novák Z, Opletal M, Ševčík J, Vorel T (2002) Geological study of the natural hazards in the area of Matagalpa, central Nicaragua. Czech Geological Survey Prague, INETER Managua, pp 1-110 (in Czech)

Johannsen A (1932) A Descriptive Petrography of the Igneous Rocks. Chicago University Press, Chicago, Illinois, Vol. 2: pp 1-428

Judd JW (1886) On marekanite and its allies. Geol Mag 3: 241-248

Le Bas MJ, Le Maitre RW, Streckeisen A, Zanettin B (1986) A chemical classification of volcanic rocks on the total alkali−silica diagram. J Petrol 27: 745-750

Ljunggren P (1960) A formation of marekanite at El Fiscal, Guatemala. Geol Mag 92: 49-53

Marshall RR (1961) Devitrification of natural glass. Geol Soc America Bull 77: 1493-1520[1493:DONG]2.0.CO;2

Noh JH , Boles JR (1989) Diagenetic alteration of perlite in the Guryongpo area, Republic of Korea. Clay Clay Miner 37: 47-58

Peccerillo A, Taylor SR (1976) Geochemistry of Eocene calc-alkaline volcanic rocks from the Kastamonu area, northern Turkey. Contrib Mineral Petrol 68: 61-

Pouchou JL, Pichoir F (1985) “PAP“(φ- ρ-Z) procedure for improved quantitative microanalysis. In: Armstrong JT (ed) Microbeam Analysis. San Francisco Press, pp 104-106

Journal of Geosciences, Published by © Czech Geological Society, with support from the Czech Geological Survey.
Webdesign inspired by aTeo. Hosted at the server of the Institute of Petrology and Structural Geology, Charles University, Prague.
ISSN: 1803-1943 (online), 1802-6222 (print)
email: jgeosci(at)
cover_rotated.gif, 15kB

SNIP (Scopus, 2017): 1.120

IF (ISI, 2017): 1.415

5 YEAR IF (ISI, 2017): 1.738

Policy: Open Access

ISSN: 1802-6222

E-ISSN: 1803-1943