نتایج جستجو برای: miocene

تعداد نتایج: 6531  

2003
Kush Tandon

To constrain the timing of rifting in the western, eastern, and northern parts of the Alboran Sea basin, seismic reflectors, corresponding to biostratigraphic boundaries and unconformities from the Miocene to Recent, are correlated using synthetic seismograms. Regions of adjacent coeval compression and extension are found in the Alboran Sea basin. Normal faulting continues in parts of the easte...

2009
Kaitlin Clare Maguire Alycia L. Stigall

—The subfamily Equinae in the Great Plains region of North America underwent a dramatic radiation and subsequent decline as climate changed from warm and humid in the middle Miocene to cooler and more arid conditions during the late Miocene. Here we use ecological niche modeling (ENM), specifically the GARP (Genetic Algorithm using Rule-set Prediction) modeling system, to reconstruct the geogra...

2008
Daniel Wescott

The status of Miocene ramamorphs has been the cause of continuous debate sine the early 19OOs. Both cladistic and molecular data has been applied to answer some of the questions that arise. However, both approaches present problems. A discussion of taxonomic nomenclature, cladistic and molecular data pertaining to middle to late Miocene ramamorphs, and six possible phyletic affinities are prese...

In this study, four well-exposed outcrops of the Asmari Fm in the southeastern part of the Izeh Zone of the Zagros Mountains were measured and sampled. In this region, the Asmari Fm is Oligocene to Early Miocene in age as determined by large benthic foraminifera. Based on depositional geometries, biogenic contents and lateral and vertical variations of facies, three depositional models are prop...

Journal: :journal of sciences, islamic republic of iran 2014
i. maghfouri moghaddam

a total 7 species and 13 genera of marine gastropod assemblages are reported for the first time from the varehh zard section (asmari formation), north of pole dokhtar, lorestan basin. the section under study, the asmari formation, lies between the shahbazam formation at the base and gachsaran formation at the top. according to the distribution of index foraminifera, the asmari formation is earl...

Journal: Journal of Tethys 2016

The Soltan Dam on the river Soltan, a branch of Tine River, is located about 19 km of Mateur city in the northeast of Tunisia. The dam is now under Study and will be constructed in 2017. The Soltan Dam has been designed as an earth fill dam with homogeneous materials. The dam and its associated concrete structures are mainly founded on marl, shale and shale of Lower Miocene age, sandstone of th...

Journal: :geopersia 2014
maryam nouradini mehdi yazdi alireza ashouri

echinoids fauna are common and distributed in the lower miocene deposits of the bagher abad area, northeast isfahan, central iran.there are six echinoid taxa belonging to the echinoidea class that can be described as: clypeaster intermedius, prinocidaris sp. andspines related to: eucidaris zaemays, stylocidaris polyacantha, spatangoid sp. and prinocidaris sp. bivalves, foraminifers,bryozoans, b...

2004
Stephen F. Pekar Robert M. DeConto

Ice-volume estimates for the early Miocene (23–16 Ma ATS) were determined by applying dO to sea-level calibrations to high-resolution dO records from ODP Sites 1090 and 1218. These calibrated records indicate that ice-volume ranged between 50% and 125% of the present day East Antarctic Ice Sheet (EAIS) during most of the early Miocene (23–17 Ma). Maximum icevolume occurred at each of the early ...

2015
Adam M. Yates

Thylacinus yorkellus is described as a new, moderately small-bodied species of thylacinid from the latest Miocene or, more likely, earliest Pliocene of South Australia. The new species can be diagnosed by the autapomorphic presence a strongly developed precingulid that terminates in a cuspidule on the anterobuccal face of the paraconid of the lower molars and a tiny basal anterior cuspidule on ...

2010
OLIVIER CHAVASSEAU YAOWALAK CHAIMANEE AUNG AUNG KYAW AYE MAUNG MANA RUGBUMRUNG JEAN−JACQUES JAEGER

Here we describe the first record of a chalicothere from the Miocene of Myanmar. The chalicothere, documented by a par− tial mandible, was unearthed from the lower portion of the Irrawaddy Formation in the region of Magway, Central Myanmar. The Burmese material belongs to an early late Miocene fauna which recently yielded hominoid remains attrib− uted to Khoratpithecus. The specimen, which is a...

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