نتایج جستجو برای: geirud formation

تعداد نتایج: 527343  

Journal: :geopersia 2014
maryam nouradini mehdi yazdi alireza ashouri

echinoids fauna are common and distributed in the lower miocene deposits of the bagher abad area, northeast isfahan, central iran.there are six echinoid taxa belonging to the echinoidea class that can be described as: clypeaster intermedius, prinocidaris sp. andspines related to: eucidaris zaemays, stylocidaris polyacantha, spatangoid sp. and prinocidaris sp. bivalves, foraminifers,bryozoans, b...

Journal: :geopersia 2015
fatemeh vaez-javadi mohsen allameh

jurassic deposits are well exposed in the bazehowz area, south west of mashhad city, east alborz, iran. it contains plant macrofossilsbelonging to eighteen species of eleven genera of various orders such as equisetales, filicales, bennettitales, cycadales,corystospermales, caytoniales, ginkgoales and pinales. two biozones were recognized in the type section of bazehowz formation.biozone i is an...

Journal: :journal of chemical and petroleum engineering 2012
jaber taherishakib mansour fatehirad hossein jalalifar

the main task of drilling the formation by the bit is done via scraping, crushing and grinding. discharging the fluid from the bit nozzles is done with high pressure which assists to break the rocks. different parameters affect the bit selection and design for each drilling formation, but the most important one is drillability that depends on hardness of the formation. in this paper, the design...

Journal: :iranian journal of earth science 0
i. maghfouri moghadam department of geology, faculty of science, lorestan university, khorram-abad, iran s. borji department of geology, ashtian branch, islamic azad university, ashtian, iran e. amini department of geology, ashtian branch, islamic azad university, ashtian, iran s. azadbakht payame noor university, khorram-abad, iran m. taherpour khalil abad young researchers club and elites, mashhad branch, islamic azad university, mashhad, iran

the qom formation, a series of shales, sandstones and carbonate deposits, is the last transgression of the sea in central iran sedimentary basin. foraminifera are one of the most important and numerous fossil groups present in the qom formation. in this study, the micropaleontology of the qom formation in three measured stratigraphic sections in south and west of tafresh (rakin, band-e-ali nagh...

2003
Zonghuang Yang Masayuki Yamauchi Yoshifumi Nishio Akio Ushida

The work is concerned with investigation of spatio-temporal phenomena on mutually coupled CNN array. Besides pattern formation and active wave propagation, we found that other interesting spatio-temporal phenomena such as phaseinversion-wave and classical waves can be also observed in the same network structure. In particular, we focus our discussion on the relations of spatio-temporal phenomen...

2001
Mariko Sakakibara

This study investigates economic and strategic inducements of R&D cooperation. We focus on industry and company factors that affect a firm’s rate of participation in R&D consortia. These factors are analyzed in a dynamic context using a sample of 312 Japanese firms in 74 industries between 1969 and 1992. We find a firm in an industry with weak competition and appropriability conditions has a hi...

Journal: :The Plant cell 2001
T Bisseling D Weigel

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