منابع مشابه
Early Diagenetic Calcareous Coal Balls and Roof Shale Concretions from the Pennsylvanian (Allegheny Series)
The calcareous concretions studied formed in different depositional environments associated with the Pcnnsylvanian eyclothems of cast central Ohio. The late syngenetic to early diagenetie coal balls from Lower Frecport Coal in Jefferson County were formed by cellular permineralization of decaying terrestrial plants in a peat swamp. These coal balls, composed of N9.N% calcite, 7.0% pyrite, and 2...
متن کاملCalcareous Bio-Concretions in the Northern Adriatic Sea: Habitat Types, Environmental Factors that Influence Habitat Distributions, and Predictive Modeling
Habitat classifications provide guidelines for mapping and comparing marine resources across geographic regions. Calcareous bio-concretions and their associated biota have not been exhaustively categorized. Furthermore, for management and conservation purposes, species and habitat mapping is critical. Recently, several developments have occurred in the field of predictive habitat modeling, and ...
متن کاملcalcareous stone
This paper looks at the changes in urban air quality and the effect on building materials with particular regard to their deterioration arising from pollution due to vehicles. The paper aims to review basic information on the likely Ž effect of NO and ozone on calcareous building materials limestone, marble, dolomite, calcareous cemented x . sandstone by examining experimental and fieldwork rel...
متن کاملStudies upon Calcareous Degeneration
IT WILL BE SEEN FROM THE ABOVE THAT WE HAVE STUDIED THE CONDITIONS ASSOCIATED WITH THE DEPOSIT OF CALCAREOUS SALTS: (I) in connection with normal and pathological ossification, and (2) in pathological calcification as exhibited in (a) atheroma of the vessels; (b) calcification of caseating tubercular lesions; (c) calcification of inflammatory new growth, and (d) degenerating tumors; and we have...
متن کاملStudies upon Calcareous Degeneration.*
INTRODUCTION. METHODS. Staining methods . Chemical methods . THE PROCESS OF DEPOSIT OF CALCIUM SALTS IN BONE. THE PROCESS OF DEPOSIT OF CALCIUM SALTS UNDER PATHOLOGICAL CONDITIONS. In the arterial wall. In chronic inf lammat ion of the pleura. In calcified fibrornata. In the walls of ovar ian and broadl igament cysts. In tubercular nodules. In pancreat ic fat necrosis. ON THE PRESENCE OP SOAPS ...
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ژورنال
عنوان ژورنال: Nature
سال: 1880
ISSN: 0028-0836,1476-4687
DOI: 10.1038/022169c0