“Pholas” Holes in Limestone
نویسندگان
چکیده
منابع مشابه
Calcium Carbonate Dissolution Rate in Limestone Contactors
The project summarized here investigated some of the parameters and relationships used to predict the performance of limestone contactors. The purpose of the project was to study the effect of limestone composition, especially the dolomite [CaMg(CO 3) 2 ] and impurity content of the stone, on the kinetics of carbonate mineral dissolution and to determine the effect of temperature on the rate of...
متن کاملSedimentology of the Salem Limestone in Indiana
The Mississippian Salem Limestone, from which dimension stone is quarried in Indiana, is principally a calcarenitic rock formed of fossil bryozoans, echinoderms, and specimens of Endothyra. Numerical associations of the fossils, binding materials, oolitically coated fossils, and voids were determined by counting points on the surfaces of 278 thin sections of the limestone. Median sizes, coeffic...
متن کاملDisabling pneumoconiosis from limestone dust.
Limestone dust is generally regarded as being relatively harmless. In this paper I wish to record eight cases of pneumoconiosis in limestone workers, in all of which limestone played the sole or principal aetiological part. My attention was first drawn to the condition in November, 1950, when I saw the chest radiograph of a patient whose occupation was limestone crushing. The appearances were m...
متن کاملThe Relation of Time, Intensity and Wave-length in the Photosensory System of Pholas
The most effective point in the visible spectrum for the stimulation of Pholas is 550 mmicro. On the red side, the effectiveness drops rapidly to almost zero. On the violet side, the effectiveness drops to about half, and rises again in such a way as to indicate a possible second maximum in the near ultra-violet. On the basis of certain ideas these data are assumed to represent the properties o...
متن کاملInfluence of Joint in the Phenomena of Solubility of Limestone
Influence of Joint in the Phenomena of Solubility of Limestone
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geological Magazine
سال: 1870
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s001675680020931x