Short-Term Vertical Datum Variability and Vertical Crustal Movements in East Asia

A surface depicting linear vertical movements in Maritime Canada was computed from sea-level data recorded by 8 tide guages and 308 mostly disjoint, relevelled segments of the first-order Canadian levelling network. Owing to the sparsity of the available data and their distribution, the velocity surface must be regarded as indicative of the crude features only. The indications are that there is a west-northwest trending belt of faster subsidence across the eastern end of the Bay of Fundy, and that there may be an area of uplift in northeastern New Brunswick. Although the faster subsidence around the eastern Bay of Fundy seems to be well established now, more data are needed to prove or dispel the existence of the indicated uplift.

Download Full-text

In search of marine terraces from Central Dobrogea (Casimcea Plateau, Western Black Sea). Preliminary inquires on distribution, extension and vertical crustal movements

Revista de Geomorfologie ◽

10.21094/rg.2020.100 ◽

2020 ◽

Vol 22 (1) ◽

pp. 87-97

Author(s):

Alexandru BERBECARIU ◽

Alfred VESPREMEANU-STROE

Keyword(s):

Black Sea ◽

The Black Sea ◽

Altitude Range ◽

Crustal Movements ◽

Paleoenvironmental Changes ◽

Marine Terraces ◽

Elevation Difference ◽

Study Sites ◽

Vertical Crustal Movements ◽

Northern Sector

Casimcea Plateau is an uplifted (exhumated) peneplain cut in Proterozoic green–schists and one of the oldest tectonic units around the Black Sea. Despite its overall monotonous physiognomy, the plateau is crossed by Casimcea Valley and presents a seaward façade to the east which preserves (sub)horizontal surfaces as testimonies of the paleoenvironmental changes (sea level and climate). This research aims to identify the marine and fluvio–marine terraces and to define their vertical distribution based on the morphometric analysis of two study sites (north – Ceamurlia; south – Tașaul Lake) using EU-DEM. 6 levels were identified as possible marine terraces within the 2–50 m altitude range and also some inferences were made concerning the age of the lower three levels. Also, the present work highlights a differential (stronger) uplift of the northern sector between Peceneaga – Camena and Ostrov – Sinoe faults reflected by both the elevation difference of 5–6 m between the terraces staircases identified at the two sites and by the elevation gaps analysed on an array of cross-fault transects carried on over Ostrov – Sinoe fault.

Download Full-text

A Method for the Evaluation of Vertical Crustal Movement from Scattered Geodetic Relevellings

Canadian Journal of Earth Sciences ◽

10.1139/e74-057 ◽

1974 ◽

Vol 11 (5) ◽

pp. 605-610 ◽

Cited By ~ 24

Author(s):

P. Vaníček ◽

D. Christodulidis

Keyword(s):

Chesapeake Bay ◽

Statistical Significance ◽

Geodetic Survey ◽

National Geodetic Survey ◽

Specific Level ◽

Vertical Crustal Movement ◽

Crustal Movements ◽

Velocity Surface ◽

Vertical Crustal Movements ◽

The U.S

The existing techniques for the quantitative evaluation of vertical crustal movements from geodetic spirit levelling have one common feature. They can deal only with a complete network of systematically relevelled connected lines. This paper presents a method, based on the least-squares fitting of a velocity surface, capable of using scattered as well as connected relevelled segments. A facility to choose a specific level of statistical significance of the results is built in. The performance of the method is tested on data for the vicinity of Chesapeake Bay. The results compare well with those of the U.S. National Geodetic Survey.

Download Full-text

Horizontal and vertical crustal movements in Iceland

Tectonophysics ◽

10.1016/0040-1951(75)90147-x ◽

1975 ◽

Vol 29 (1-4) ◽

pp. 223-231 ◽

Cited By ~ 8

Author(s):

Karlheinz Schäfer

Keyword(s):

Crustal Movements ◽

Vertical Crustal Movements

Download Full-text

The use of smooth piecewise algebraic approximation in the determination of vertical crustal movements in Eastern Canada

Dynamic Planet - International Association of Geodesy Symposia ◽

10.1007/978-3-540-49350-1_72 ◽

2008 ◽

pp. 496-503

Author(s):

Azadeh Koohzare ◽

Petr Vaníček ◽

Marcelo Santos

Keyword(s):

Eastern Canada ◽

Crustal Movements ◽

Algebraic Approximation ◽

Vertical Crustal Movements

Download Full-text

Application of PPP Solution to Determine the Absolute Vertical Crustal Movements: Case Study for Northeastern Europe

Proccedings of 10th International Conference "Environmental Engineering" ◽

10.3846/enviro.2017.207 ◽

2017 ◽

Cited By ~ 1

Author(s):

Kamil Kowalczyk ◽

Janusz Bogusz

Keyword(s):

Time Series ◽

Vertical Movements ◽

Crustal Movements ◽

Northeastern Poland ◽

The Absolute ◽

Set Up ◽

Changes Over Time ◽

The Relationship ◽

Vertical Crustal Movements

To estimate the relationship between vertical movements of the Earth’s crust, geoid temporal changes and Mean Sea Level (MSL) variations, a knowledge about the absolute (determined from satellite and space techniques) height changes over time is required. In this paper, we give an idea of determining the height changes with a use of Vertical Switching Edge Detection (VSED) algorithm. On the basis of the least squares estimation, the VSED method detects the discontinuities in time series and determines the values of jumps at the same time. We used the time series from PPP (Precise Point Positioning) solution obtained in NGL (Nevada Geodetic Laboratory) using satellite data gathered at more than 50 permanent stations located in Latvia, Lithuania and northeastern Poland. The minimum time span of data was set up to 3 years. Data were pre-analyzed by removing outliers and interpolating small gaps. The obtained results give an overview of a possibility of the proposed method to be used and the ongoing vertical movements on the area we considered.

Download Full-text