Nonnally oil or gas occupy only a small fraction of the total pore -1. volume in the subsut!l:-ece; the rest of the spJlce contains water_.Sometimes the water associated with the oil is fresh, but usually it is salty. In general, the deeper and older a rock is, the saltier the water it contains. Thr origin of oil-field brines is not well understoo…
The book summarizes the occurrence, geochemistry, mineralogy, petrology and phaseequilibria studies in air and under high pressures related to the most intriguing group of potassium-rich mafic and ultramafic rocks, often including host of exoyic mineral assemblages including feldspathoids.
Senggigi is the prime tourist destination in Lombok Island, and one of the best places in Indonesia for urism. This resort is located at the west beach, and on 'the hilly part of Lombok Island. Based on its logy, this area has incompacted volcanic rocks from Tertiary and Quarterly ages. The increase of vironmental pressures causes instability to t…
Edisi
2nd vol
ISBN/ISSN
-
Deskripsi Fisik
xviii, 942 p. : ill. ; 21.5cm
Judul Seri
From The Earth Sciences to Prosperity, Sustainability and Integrity of Indonesia
Predominant quartz sandstones in this area belong to the Balikpapan beds. It is light grey to white in color and turned brown in weathered rocks, fine to medium grained, subangular to angular, well bedded sorted and partly with coal grain impurities. Limonitic concretion or limitc coatings were usually found above the quartz sandstone bed. Mudstones…
Fifteen newly determined radiocarbon dates indicated the presence of former shorelines up to 3 meters above present high tide level in the tectonically stable Peninsula of Malaysia. The sea level indicators consist of oysters in growth position (9 sampels), moulluscs in beach deposits (2), corals in growth position (3), and beachrock (1). In the Pen…
The geological structure of France goes back 2,000 million, which is the age of the oldest rocks known. After the Pre-Cambrian Orogeny, which is represented in the north of the Armorican Chain, the Caledonian and above all the ian Orogeny formed the crystalline and metamorphic ossature of the country. All that i…
•The petroleum geochemist seeks to determine if rocks contain organic quantity and o~ the appropriate type to source those rocks have been heated sufficiently to allow the He will also try to ~stkblish if hydrocarbons have been generated before, and faulting, and if the rate of heating has varied with time associated wiith tectonic causes. Jf …
Perlite is a glassy yolcanic rock which will upon Tap id and controlled heating, expand or ''pop" into a frothy aterial of low bulk density -valued as a lightweight aggregate. Occurrences and commercial deposits of perli te are iknown throughout the world as well~exposed flows and domes of Tertiary and Quaternary age like most of the -volcanic …
Investigations of the acid volcanic rocks in New• Zealand have shown that the must promising perlite deposits are the glassy rhyolites of the Taupo-Rotorua and Tuirua districts. Tl,c Lest-grade rock is at Ongaroto, Maroa, Tairua, and Lake lfotoma. Large quantities …
Natural slopes can be classified by referring to the activity state (Varnes, 1978). Active slopes are those that are either currently moving or not moving at the present but have moved within the last seasonal cycle. Inactive slopes are those where there is no evidence that movement has taken place within the last seasona…