S Soleymani; B Hamdi; A.R Karimi Bavandpur
Abstract
The studied section is located in the southern flank of the Central Alborz, 5 kilometers north of Shahmirzad City in the Semnan province. This section is situated at 35° 48′ 40″ N latitude and 53° 16′ 59″ E longitude. The Mila Formation has 5 measurable members in Type ...
Read More
The studied section is located in the southern flank of the Central Alborz, 5 kilometers north of Shahmirzad City in the Semnan province. This section is situated at 35° 48′ 40″ N latitude and 53° 16′ 59″ E longitude. The Mila Formation has 5 measurable members in Type Section (Mila Kuh, Damghan City) and only in this studied section. This formation overlies conformably the Early Cambrian Lalun Sandstone Formation and underlies disconformably the Early Devonian red conglomerates. Studied Conodonts of this formation are of Proconodontus type belonging to Coniform Groups. 14 species and 6 genera of these conodonts were acquired indicating an age of Mid-Late Cambrian and Early Ordovician. These Conodonts are listed as below: Proconodontus serratus, Proconodontus muelleri, Proconodontus rotundatus, Prooneotodus sp?, Prooneotudus tenuis, Furnishina furnishi, Furnishina asymmetrica,Furnishina sp., Furnishina obliqus-Hirsutodontus?, Westergardodina cf. mossbergensis,Westergardodina fossa, Cordylodus, Cordylodus intermedius, Cordylodus lindstromi,Cordylodus proavus, Oneotodus nakamurai & Problematoconites sp. A remarkable point is the discovery of species Prooneotodus tenuis in the second member of Mila Formation because no conodont has already been reported from this member. Other microfossils such as Trilobites, Brachiopoda, Hyolithes, Eocrinoidae, Rusophycus, Cruziana, Paleoscoleidae and Sponges were also obtained indicating the deposition of Mila Formation in a shallow marine environment. These fossils assemblage are comparable with those from other parts of Iran and neighbor countries.
S Soleymani; M.H Mahmudy Gharaie2; F Ghasemzadeh; A Sayyareh
Abstract
Water quality assessment is very important in the area where water resources are used as drinking water. Monitoring of polluted waters and its distribution are applied in water management planning. It requires information on the location, the amount and distribution of chemical parameters on the samples ...
Read More
Water quality assessment is very important in the area where water resources are used as drinking water. Monitoring of polluted waters and its distribution are applied in water management planning. It requires information on the location, the amount and distribution of chemical parameters on the samples from studied area. Identification of contaminant type, the sites, and also optimum use of water for different purposes are helpful. Thus, for these purpose six chemical parameters of TDS، SO42-، Cl-، Na+، Mg2+، Ca2+, which are referred by WHO standard were examined to apply for GQI method by GIS. The GQI method of groundwater quality evaluated and prepared a groundwater quality map in west region of kooh-sorkh. Values of GQI index vary between 82.9% to 94.8%, which indicate the groundwater quality placed in suitable to acceptable class of quality. Groundwater quality map indicate that GQI index values reduced from lateral sides to the center of studied region. It may be affected by geological factors such as lithology, current direction and also hydrothermal system in the area.
