Middle Ordovician Conodonts And Fish From The Stairway Sandstone, Amadeus Basin
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چکیده
منابع مشابه
Conodonts and Biostratigraphy of Upper Ordovician Strata along a Shelf to Basin Transect in Central Nevada
Conodonts representing 38 species of 26 genera have been identified in samples from Upper Ordovician rocks at three central Nevada localities. Ranges of these species and associated graptolites are used graphically to determine correlation of the strata considered with an evolving composite standard that includes information from Ordovician strata at more than 100 localities in North America. R...
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The tail of the earliest known articulated fully skeletonized vertebrate, the arandaspid Sacabambaspis from the Ordovician of Bolivia, is redescribed on the basis of further preparation of the only specimen in which it is most extensively preserved. The first, but soon discarded, reconstruction, which assumed the presence of a long horizontal notochordal lobe separating equal sized dorsal and v...
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—Relative abundance data are of primary importance in paleoecology, but it is not always obvious how they should be interpreted. Because relative abundance is expressed as a proportion of the total sample, change in the abundance of one group necessarily changes the relative abundance of all groups in the sample. There are two possible interpretations for a trend in the relative abundance of a ...
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Late Precambrian to early Cambrian sediments of the Amadeus Basin, Central Australia, contain two stable directions of magnetization. Lithologies are diverse and include red beds, green beds, and carbonates, all of which respond to thermal cleaning. Positive fold and unconformity tests, and a well-defined polarity zonation reveal the primary component and direction of magnetization. This direct...
متن کاملMiddle Ordovician Section at Crown Point Peninsula
All the stops for this trip are within the Crown Point Reservation State Historic Site. From the west, take NY Route 22 north from Ticonderoga, continuing north through the Village of Crown Point. Turn east approximately five miles north of the Village of Crown Point, following signs to the 'Bridge to Vermont'. From the east, take VT Route 22A north from Fairhaven, or south from Burlington area...
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ژورنال
عنوان ژورنال: ASEG Extended Abstracts
سال: 2018
ISSN: 2202-0586
DOI: 10.1071/aseg2018abp052