In a previous paper ' the writers suggested that some rexplosion structures currently attributed to volcanism may actually record impacts of giant meteorites which fell during the geological past. It is the purpose of this article to show how meteorite craters and th eir underlying structures might be preserved, and to evaluate the meteoritic hypothesis as an 'explanativn for three structures w...

arghash – ghasem-abad area in ne iran is located in the rim of the sabzevar structural zone. tertiary outcrops include granite and quartz monzodiorite porphyry associated with dacite and andesite volcanic rocks. in the study area, quartz gabbro and quartz monzodiorite dykes intruded the older rocks. granite and volcanic rocks host au-sb-bearing quartz-calcite veins. mineralized veins are mainly...

Introduction In the following chapters we will find that nearly all of the varied aspects of volcanism are either directly or indirectly controlled by the chemical composition of magma and the rate at which it cools and solidifies. If you are to understand and appreciate subsequent discussions of volcanoes and related volcanic phenomena, it is essential that you have a good grasp of the basic c...

Aeromagnetic surveys of the Hawaiian Islands have revealed that the pr imary magnetic anomalies associated with the islands are dipole anomalies caused by the intrusive rocks of the volcanic centers and rift zones. Comparisons of the direction of magn etization indicated by the dipole anomalies with results of laboratory measurements on iavas show that in many cases the lavas possess reverse po...

Fine-grained sedimentary rocks (shale and mudstone) play important roles in global CO2 abatement efforts through their uses in carbon capture and storage (CCS), radioactive waste storage, and shale gas extraction. These different technologies, however, rely on seemingly conflicting premises regarding the sealing properties of shale and mudstone, suggesting that those rocks that lend themselves ...

Groundwater development in fractured hard rock aquifers has always assumed a secondary role compared with that in unconsolidated alluvial strata or in soluble carbonate rocks. This is because of the nonextensive, irregular, nonisotropic, and inhomogeneous nature of the aquifer and the relatively small yields of water available from dug-wells or drilled bores. However, many of the highly populat...

This paper presents the Ruskin Rocks project which is developing a rock instrument, making use of interactive multimedia to augment the musical characteristics of stones. Several historical rock instruments, which inspired the building of this instrument – iRock – are discussed. Fundamental vibration theory is applied to understand the musical nature of the rocks, and empirical data presented t...

introduction in the east and northeast of sanandaj in the qorveh-bijar-takab axis, there are series of basaltic composition volcanoes with quaternary age. the study area is part of the sanandaj-sirjan zone and is located between 47°52' and 47°57' e longitudes and 35°26 and '35°30' n latitudes. due to the location of the volcanic cone on pliocene clastic sediments and quaternary travertine, the ...