Results 81 to 90 of about 203,697 (195)

Evolution of the internal structure and physical properties of Tongxin sandstone under high temperature

Frontiers in Earth Science
The stability of the surrounding rock under high temperature is pivotal to the efficient and safe production of high-temperature fluidized mining engineering.
Guanghui Jiang, Jintao Wang, Jinhao Wen, Jinhao Wen, Xingzong Liu, Bangyong Yu, Bangyong Yu, Yihan Wang   +7 more
doaj   +1 more source

Lichens as possible agents of sandstone deterioration in Jesuitic ruins of San Ignacio Miní (Misiones Province, Argentina)

Materiales de Construccion, 2010
The ruins of San Ignacio Miní, in NE Argentina, Misiones Province, included by the UNESCO in the list of World Heritage in 1984, were built in the 18th century by the Guarani people under the supervision of the Jesuite Congregation. The ruins are located
V. G. Rosato
doaj   +1 more source

Fossil Glasses Produced by Impact of Meteorites, Asteroids and Possibly Comets with the Planet Earth [PDF]

, 1962
In recent times one of the most intriguing mysteries of geology bas been the occurrence of aerodynamically-shaped glasses on five continents of the earth. These glasses under discussion are obviously not of fulgurite origin.
Cohen, A. J.
core   +1 more source

Local Percolation Probabilities for a Natural Sandstone

, 1996
Local percolation probabilities are used to characterize the connectivity in porous and heterogeneous media. Together with local porosity distributions they allow to predict transport properties \cite{hil91d}.
B. Virgin, Boger, Hansen, Haslund, Hilfer, Hilfer, Hilfer, Hilfer, Hilfer, Hilfer, Hilfer, Nøst, Ostertag-Henning, Ostertag-Henning, R. Hilfer, T. Rage   +15 more
core   +1 more source

Tracking dinosaurs in Scotland [PDF]

, 2005
<p>Dinosaurs, the Loch Ness Monster not included, are a rarity in Scotland. Although dinosaurs have been known of in England and elsewhere in the world for over 300 years, it was only in the last 23 years that dinosaurs began to appear in Scotland.
Clark, N.D.L.
core  

Geology of the Hamilton region [PDF]

, 1967
This account takes the form of a synopsis which closely follows that prepared for a bulletin entitled "Geology of the Ngaruawahia Subdivision" (Kear and Schofield, in press).
Schofield, J.C.
core   +1 more source

Evolution law of true triaxial unloading mechanical properties of sandstone after high temperature

Meitan kexue jishu
In the process of underground coal gasification and geothermal energy mining, the change of high temperature environment and stress field will affect the mechanical properties and strength characteristics of rocks, and the study of the change of the ...
Gang WANG, Jinye ZHENG, Yixin LIU, Qingao ZHU, Baodong YANG, Yulin FAN   +5 more
doaj   +1 more source

Hepaticae of Cerro Venamo, Venezuela, collected by J. Steyermark [PDF]

, 2002
A revision of herbarium material (NY) from Cerro Venamo, Venezuela (5°59’ N, 61°23’ W, 1890 m) yielded 77 hepatic species in 44 genera and 13 families. Most species have a neotropical distribution (75,32%), 6,49%, are pantropical and 9,09% are reported ...
Borges, Anna Luiza Ilkiu, Dauphin, Gregorio   +1 more
core  

Nature and dependence of variations of water permeability of the rocks of the active water exchange zone on the east of Tatarstan

Известия высших учебных заведений: Геология и разведка, 2016
The variations of water permeability of the reservoir rocks with the most productive characteristics for the drinking ground water in the oil regions of Tatarstan are considered. The pore porosity is shown to be responsible for the filter coefficients to
R. Kh. Musin, R. Z. Musina
doaj  

Saline–CO₂ Solution Effects on the Mechanical Properties of Sandstones: An Experimental Study

Applied Sciences
In deep brine oil and gas injection–production operations, the combined long-term effects of brine and carbon dioxide on rock mechanical properties are not clear.
Motao Duan, Haijun Mao, Guangquan Zhang, Junxin Liu, Sinan Zhu, Di Wang, Hao Xie   +6 more
doaj   +1 more source