Evidence for post-Triassic brittle faults in eastern Connecticut and south-central Massachusetts using LiDAR, geomorphic, and geophysical data combined with field observations: Implications for the origin of the Moodus area seismicity

2013 ◽  
pp. 51-88
Author(s):  
Ronald T. Marple ◽  
Robert J. Altamura ◽  
Shelton S. Alexander ◽  
James D. Hurd
Keyword(s):  
Geophysical Data ◽  
Field Observations ◽  
South Central

Fault zone migration by footwall shortcut and recumbent folding along an inverted fault: example from the Mosha Fault, Central Alborz, Northern Iran

2014 ◽  
Vol 51 (9) ◽  
pp. 825-836 ◽  
Author(s):  
Mohsen Ehteshami-Moinabadi
Keyword(s):  
Fault Zone ◽  
Structural Data ◽  
Field Observations ◽  
The South ◽  
Northern Iran ◽  
South Central ◽  
Major Mode ◽  
Central Alborz ◽  
Southward Migration ◽  
Mosha Fault

The Mosha Fault is a multiply inverted fault in the Central Alborz. Field observations and structural data from this fault show that a footwall shortcut is the major mode of response of this fault to contractional deformation. Although the Mosha Fault is a basement-involved fault, there is no evidence of involvement of basement along its footwall shortcuts, at least in the study area. Footwall shortcuts along this fault vary in size from several hundreds of metres to tens of kilometres, suggesting that a footwall shortcut can be scale independent. It is proposed that footwall shortcuts can also occur as blind thrusts under fault-related folds in the terrains near the major inverted faults. Similar cases also exist in other regions such as Japan. Some large footwall shortcuts may be the causative fault of devastating earthquakes in the active inverted terrains such as the south Central Alborz. Incompetent layers acting as detachments may play an important role in the development of footwall shortcuts. Recumbent folding in the form of a cover nappe in the footwall of the Mosha Fault is another case of southward migration of deformation along the Mosha Fault by which the fault has responded to the Oligo-Miocene compression. This case can be considered as a newly recognized style of deforming structure that occurred along an inverted fault.

The Ball-court Petroglyph Boulders at Jacaná, South-central Puerto Rico

2010 ◽  
Vol 20 (3) ◽  
pp. 323-344 ◽  
Author(s):  
Johannes Loubser
Keyword(s):  
Puerto Rico ◽  
Field Observations ◽  
South Central

Detailed information gleaned from the approximately 800-year-old proto-Taíno petroglyph boulders at the Jacaná ball-court in south-central Puerto Rico highlights their research potential, particularly when based on detailed field observations and placed within an ethno-historic context.

scholarly journals The Livelihood Challenge of Forest Honey Bee Farmers amidst COVID-19 Pandemic in Mutis, Indonesia

2021 ◽  
pp. 526-542
Author(s):  
Gerson Ndawa Njurumana ◽  
Norman P.L.B. Riwu Kaho ◽  
Elisa Iswandono ◽  
Sherley S. Wila Huky ◽  
Budy Z. Mooy ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Honey Bee ◽  
Habitat Management ◽  
Field Observations ◽  
Short Term ◽  
Management Performance ◽  
South Central ◽  
Forestry Sector ◽  
Depth Interviews ◽  
Increased Pressure

The COVID-19 pandemic has affected various sectors of the global communities, including those that depend on forests for honey products. Furthermore, the dynamics of production and availability are completely affected by government restrictions. This study focuses on the short-term effects of the COVID-19 pandemic on the forestry sector. Specifically, it examines the pandemic effect on forest honey farmers in habitat management, harvesting, marketing, farmer institutions, and livelihoods. The study was conducted on forest honey bee farmers through field observations and structured and in-depth interviews. Data were collected using five variables and 30 indicators in Fatumnasi Subdistrict, South Central Timor Regency and analyzed using descriptive and quantitative analysis. The results showed that the COVID-19 pandemic has changed the socio-cultural and economic utilization of forest honey. Additionally, social restrictions have reduced habitat management performance, farmers institutions and livelihoods, harvesting, and marketing. This has increased pressure on the livelihoods of forest honey bee farmers than before the pandemic. Moreover, it has directly affected their lives and the ability to provide quality forest honey. Therefore, interventions are needed to strengthen marketing and institutional networks to face the changes during and after the COVID-19 pandemic.

scholarly journals Supplemental Material: Three-dimensional shape and structure of the Susitna basin, south-central Alaska, from geophysical data

2020 ◽  
Author(s):  
A.K. Shah
Keyword(s):  
Seismic Data ◽  
Three Dimensional ◽  
Geophysical Data ◽  
Magnetic Data ◽  
South Central ◽  
Dimensional Shape ◽  
Three Dimensional Shape

Shapefiles providing locations of faults and folds determined from magnetic and seismic data, or just magnetic data, with projection NAD27-UTM5N.<br>

scholarly journals Supplemental Material: Three-dimensional shape and structure of the Susitna basin, south-central Alaska, from geophysical data

2020 ◽  
Author(s):  
A.K. Shah
Keyword(s):  
Seismic Data ◽  
Three Dimensional ◽  
Geophysical Data ◽  
Magnetic Data ◽  
South Central ◽  
Dimensional Shape ◽  
Three Dimensional Shape

Shapefiles providing locations of faults and folds determined from magnetic and seismic data, or just magnetic data, with projection NAD27-UTM5N.<br>

scholarly journals Supplemental Material: Three-dimensional shape and structure of the Susitna basin, south-central Alaska, from geophysical data

2020 ◽  
Author(s):  
A.K. Shah ◽  
et al.
Keyword(s):  
Magnetic Field ◽  
Three Dimensional ◽  
Geophysical Data ◽  
Metavolcanic Rock ◽  
South Central ◽  
Total Gradient ◽  
Dimensional Shape ◽  
Surface Geology ◽  
Three Dimensional Shape

Figure S1 showing locations of magnetic high-low anomalies that exhibit total gradient highs, numbered 1–3 as described in the text with: (A) simplified surface geology (colors as in Fig. 2), arrow marks an area near metavolcanic rock described as Triassic to Pennsylvanian? by Wilson et al. (2015); (B) reduced-to-pole magnetic field; and (C) total gradient and thick black lines delineate faults interpreted in this study and by Haeussler and Saltus (2011).<br>

Evaulation of remote sensing, geological and geophysical data for south-central New York and northern Pennsylvania

1982 ◽  
Author(s):  
M.H. Podwysocki ◽  
H.A. Pohn ◽  
J.D. Phillips ◽  
M.D. Krohn ◽  
T.L. Purdy ◽  
...  
Keyword(s):  
Remote Sensing ◽  
New York ◽  
Geophysical Data ◽  
South Central ◽  
Central New York

Rediscovery of the Mattawa Anorthosite Massif, Grenville Province, Quebec

2005 ◽  
Vol 42 (10) ◽  
pp. 1699-1718 ◽  
Author(s):  
Brent E Owens ◽  
Robert F Dymek
Keyword(s):  
Rock Type ◽  
Laboratory Data ◽  
Field Observations ◽  
Plagioclase Composition ◽  
Grenville Province ◽  
The Core ◽  
South Central ◽  
Border Zones ◽  
Anorthosite Massif ◽  
Domal Structure

We present new field observations and laboratory data confirming the presence of the Mattawa Anorthosite Massif (MAT), whose existence in south-central Quebec was hinted at more than 35 years ago. MAT thus represents a newly recognized member of the late- to post-tectonic ~1060–1010 Ma andesine anorthosite belt that includes the Château-Richer, St. Urbain, and Labrieville massifs. The dominant rock type at MAT is foliated andesine anorthosite or leuconorite, and orientations of foliations indicate that the pluton has the shape of a dome. MAT contains separate core and border zones, which are distinguished on the basis of plagioclase composition and concentrations of Ga, Rb, Sr, and Ba. Xenoliths of labradorite anorthosite having Ga, Sr, and Ba concentrations different from those of the host andesine anorthosites occur sporadically throughout the pluton as well. Lastly, rocks enriched in Fe, Ti, and P (jotunite, oxide–apatite gabbronorite, nelsonite, ilmenitite) also occur at MAT, primarily near the core–border transition or at the pluton margins. Compared with other anorthosites in the andesine belt, MAT is compositionally most similar to Labrieville. By analogy with Labrieville, we interpret the concentric zoning of MAT (more sodic core, more calcic border) to reflect polybaric crystallization accompanying upward intrusion as a magmatic diapir, which also produced the overall domal structure. The labradorite xenoliths bear little physical or compositional resemblance to typical Lac St. Jean rocks. Therefore, if the xenoliths were derived from the Lac St. Jean Anorthosite, their present character must reflect considerable modification by the Mattawa magma.

scholarly journals Bayesian geological and geophysical data fusion for the construction and uncertainty quantification of 3D geological models

2019 ◽  
Author(s):  
Hugo K. H. Olierook ◽  
Richard Scalzo ◽  
David Kohn ◽  
Rohitash Chandra ◽  
Ehsan Farahbakhsh ◽  
...  
Keyword(s):  
Western Australia ◽  
Cross Sections ◽  
Gravity Data ◽  
3D Models ◽  
Geophysical Data ◽  
Field Observations ◽  
Geological Maps ◽  
Geological Models ◽  
Traditional Approaches ◽  
Geological Units

Abstract. Traditional approaches to develop 3D geological models employ a mix of quantitative and qualitative scientific techniques, which do not fully provide quantification of uncertainty in the constructed models and fail to optimally weight geological field observations against constraints from geophysical data. Here, we demonstrate a Bayesian methodology to fuse geological field observations with aeromagnetic and gravity data to build robust 3D models in a 13.5 × 13.5 km region of the Gascoyne Province, Western Australia. Our approach is validated by comparing model results to independently-constrained geological maps and cross-sections produced by the Geological Survey of Western Australia. By fusing geological field data with magnetics and gravity surveys, we show that at 89 % of the modelled region has > 95 % certainty. The boundaries between geological units are characterized by narrow regions with

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