منابع مشابه
Systematics and Biostratigraphy of Foraminifera in Albian to Lower Cenomanian Deposits at Kerch Section (Southwest Qayen)
In this research systematics and biostratigraphy of the Cretaceous deposits foraminifera in Kerch section, southwestern Qayen, in the eastern margin of the Lut Block, were studied in detail. This section with 260 meters thickness, mainly formed by gray to cream color marl and shale, marly limestone and limestone laid on a light-colored limestone bed at the base. Seventeen genera and twenty two ...
متن کاملThe State of Silurian
The geological sciences demand close international cooperation as wel as a rigorous and clearly understood language of words. Nowhere is this more keenly felt than in stratigraphy where, despite the luxury of long philosophical discussions on rocks versus time, many feel a sense of urgency about attempts to achieve a standard global chronostratigraphy. The now wel-known pioneer work of the inte...
متن کاملA Silurian 'marrellomorph' arthropod.
Xylokorys chledophilia, a new arthropod with three-dimensionally preserved soft tissues, is described from the Herefordshire (Silurian) Lagerstätte of England. The head and trunk are covered by a relatively featureless ovoid carapace, which comprises a domed central part and a flange-like border. The head bears five pairs of appendages. The first is uniramous, with dorsal and ventral projection...
متن کاملCryptic Disc Structures Resembling Ediacaran Discoidal Fossils from the Lower Silurian Hellefjord Schist, Arctic Norway
The Hellefjord Schist, a volcaniclastic psammite-pelite formation in the Caledonides of Arctic Norway contains discoidal impressions and apparent tube casts that share morphological and taphonomic similarities to Neoproterozoic stem-holdfast forms. U-Pb zircon geochronology on the host metasediment indicates it was deposited between 437 ± 2 and 439 ± 3 Ma, but also indicates that an inferred ba...
متن کاملRelationships of Lower Silurian Strata in Ohio, West Virginia, and Northern Kentucky
The Brassfield Formation, consisting mainly of carbonate strata, is overlain by beds of the Dayton Formation at several localities in southwestern Ohio, high on the east flank of the Cincinnati Arch. The Brassfield thickens eastward into the subsurface and becomes separated from the Dayton by an expanding wedge of shale and carbonate beds. The writer considers these beds to be equivalent to the...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1876
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800154251