Titlebook: Siliceous Deposits of the Tethys and Pacific Regions; James R. Hein,Jelena Obradović (Faculty of Mining Conference proceedings 1989 Sprin

Tracheotomy

Radiolarite Sequences of the Subbetic, Betic Cordillera, Southern Spainone and marl, and pelagic limestone with radio larians. Virtually all transitional lithologies among the three listed exist. Clay minerals, calcite, and hematite make up the radiolarite impurities. Smectite, illite, and locally kaolinite are the clay minerals present, smectite always being most abun

EXUDE

Petrology and Diagenetic Changes in Miocene Marine Diatomaceous Deposits from Zakynthos Island, Greederlain by Cretaceous-Eocene reefal limestone and overlain by a middle-upper Miocene terrigenous—evaporitic succession, is defined as the Romiri Formation. Diatom and planktonic foraminiferal assemblages occur, the latter determining the biostratigraphic interval N.-N. of the Blow zonation (Aquitani

精确

Thermally Induced Silica Transformation in Pliocene Diatomaceous Layers from Aegina Island, Greece, and LM analyses show that opal-A is partly transformed to opal-CT. The age of the sedimentary rocks, the absence of distinct zones of opal-A and opal-CT, and the shape and position of opal-CT (101) peak in XRD patterns show that silica diagenesis took place at shallow burial depths. The transforma

厌食症

Silicified Wood from the Adoyama Chert, Kuzuh, Central Honshu, and Its Bearing on Compaction and Depo, central Honshu. Sedimentary laminae bent around the silicified wood allowed us to estimate minimum compaction of the quartzose bedded chert to be 60%. Assuming an initial porosity for the sediment of 80%, the maximum compaction would have been 80%. The 3.9 cm average thickness of chert beds and t

reptile

pantomime

使人烦燥

Thermal Alteration of Chert in the Ophiolite Basement of Southern Central Americaious phenomena of thermal alteration occur due to post-depositional mafic magmatism. Progressive destruction of sedimentary features is classified into four stages from weak to complete recrystallization. Increases in quartz crystallinity reflecting diagenetic to high-grade thermometamorphic conditi