نتایج جستجو برای: geological boundary

تعداد نتایج: 183188  

2004
Arta Dilo Alfred Stein

Vagueness occurs often in spatial information. A concept is vague if objects exist that cannot be classified either to the concept or to its complement. Vagueness arises in the presence of borderline cases. Examples are soil maps, geological maps, forestry inventories, and vegetation maps. Soil classes, or vegetation classes are such that they cannot be defined sharply. The change from one clas...

2007
Paul E. Olsen

T he "impact theory" views the history of life as punctuated by catastrophic mass extinctions caused by the impact of large extraterrestrial bodies, such as comets or asteroids (Fig. 1). The theory was originally developed to explain the well-known catastrophic mass extinctions around the CretaceousTertiary boundary (65 MA) but it has now been extended to explain other apparent mass extinctions...

Journal: :JCP 2012
Yanlin Shao Ailing Zheng Youbin He Keyan Xiao

3D modeling method is divided into geospatial modeling and 3D geological modeling. 3D geological modeling technique has become a favorable tool for people to observe and analyze the geological body enriched in mineral resources. Unlike geospatial modeling, 3D geological modeling must consider various geological conditions affecting spatial shape and petrophysical distribution of geological body...

2007
C. H. Holland

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...

2006
David R. Marchant James W. Head Mikhail A. Kreslavsky

Introduction: The dichotomy boundary represents one of the most important geological and geophysical features of Mars. We have been assessing the nature of modification processes along the dichotomy boundary at northern mid-latitudes in the Deuteronilus-Protonilus region and have found evidence for extensive regional Amazonian glaciation in lobate debris aprons (LDA) and lineated valley fill (L...

امامعلی پور, علی, میرمحمدی, میرصالح,

The Heydarabad bauxite-laterite deposit is located in 63 km southeast of Urmia city. This ore deposit occurs as a concordant layer within the boundaries of Upper Permian and Lower Triassic carbonate units (limestone and dolomite), although it has been suffered some tectonic displacements along its direction. The studied horizon varies from 15-20 m in thickness and has an east-west trend with a ...

2001
Felix Herrmann

A matching pursuit algorithm is used to obtain quantitative information on the litho-stratigraphical content of seismic data. The method is based on a greedy non-linear algorithm decomposing the data into atoms drawn from a redundant dictionary defined by fractional splines. The atom’s parametrization provides localized scale, order and direction attributes which carry information on the strati...

Journal: :ISPRS international journal of geo-information 2022

Geological maps have wide coverage with low acquisition difficulty. When other geological survey data are scarce, they a valuable source of structure information for modeling. However, structures large deformation, map has difficulty meeting the requirement its 3D Therefore, this paper takes dome as an example to explore modeling method based on maps, DEM and related knowledge. The includes: (1...

Estimating the gravity anomaly causative bodies boundary can facilitate the gravity field interpretation. In this paper, 2D discrete wavelet transform (DWT) is employed as a method to delineate the boundary of the gravity anomaly sources. Hence, the GRACE’ satellite gravity data is decomposed using DWT. DWT decomposites a single approximation coefficients into four distinct components: the appr...

2015
Liang Wu Lei Xue Chaoling Li Xia Lv Zhanlong Chen Mingqiang Guo Zhong Xie Georgios V. Gkoutos

The use of digital information in geological fields is becoming very important. Thus, informatization in geological surveys should not stagnate as a result of the level of data accumulation. The integration and sharing of distributed, multi-source, heterogeneous geological information is an open problem in geological domains. Applications and services use geological spatial data with many featu...

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