Euleptes gallicaMüller (Squamata: Gekkota: Sphaerodactylidae) from the Lower Miocene of North-West Bohemia, Czech Republic

2010 ◽  
Vol 59 (4) ◽  
pp. 323-328 ◽  
Author(s):  
Andrej Čerňanský ◽  
Aaron M. Bauer
Keyword(s):  
Czech Republic ◽  
Lower Miocene ◽  
North West ◽  
West Bohemia

scholarly journals A New Approach to the Assessment and Delimitation of Environmentally Damaged Areas in the Czech Republic

Geografie ◽  
1996 ◽  
Vol 101 (2) ◽  
pp. 143-157
Author(s):  
Václav Poštolka
Keyword(s):  
Czech Republic ◽  
The Czech Republic ◽  
New Approach ◽  
North West ◽  
The North ◽  
West Bohemia ◽  
New Criteria

The paper deals with the proposal of new criteria and methodology for geographical delimitation and differentiation of "environmentally damaged areas" in the Czech Republic. This new approach is based on "ecological, social and health load assessment" on the municipality area level by means of 27 proposed indicators. By means of this methodology more than 1200 selected municipalities out of the more than 6000 ones existing in the Czech Republic, all the municipalities from the North-West Bohemia area included, were assessed.

scholarly journals Event couple spectral ratio Q method for earthquake clusters: application to North-West Bohemia

2018 ◽  
Author(s):  
Marius Kriegerowski ◽  
Simone Cesca ◽  
Matthias Ohrnberger ◽  
Torsten Dahm ◽  
Frank Krüger
Keyword(s):  
Wave Attenuation ◽  
Attenuation Factor ◽  
Source Region ◽  
Spectral Ratio ◽  
Ratio Method ◽  
Earthquake Swarms ◽  
North West ◽  
High Attenuation ◽  
West Bohemia ◽  
Spectral Ratio Method

Abstract. We develop an amplitude spectral ratio method for event couples from clustered earthquakes to estimate seismic wave attenuation (Q−1) in the source volume. The method allows to study attenuation within the source region of earthquake swarms or aftershocks at depth, independent of wave path and attenuation between source region and surface station. We exploit the high frequency slope of phase spectra using multitaper spectral estimates. The method is tested using simulated full wavefield seismograms affected by recorded noise and finite source rupture. The synthetic tests verify the approach and show that solutions are independent of focal mechanisms, but also show that seismic noise may broaden the scatter of results. We apply the event couple spectral ratio method to North-West Bohemia, Czech Republic, a region characterized by the persistent occurrence of earthquake swarms in a confined source region at mid-crustal depth. Our method indicates a strong anomaly of high attenuation in the source region of the swarm with an averaged attenuation factor of Qp 

scholarly journals The lower Miocene flint conglomerate, Jylland, Denmark: a result of the Savian tectonic phase

2020 ◽  
Author(s):  
Erik Skovbjerg Rasmussen ◽  
Karen Dybkjær
Keyword(s):  
Upper Cretaceous ◽  
Early Miocene ◽  
Coarse Grained ◽  
Local Source ◽  
Lower Miocene ◽  
North West ◽  
Grain Sizes ◽  
Tectonic Events ◽  
Active Salt ◽  
The Common

The early Miocene was an important period for the development of the eastern North Sea. Tectonism in North-West Europe resulted in uplift of the Scandinavian mountains, reactivation of salt structures, inversion of old graben structures and deposition of the most coarse-grained deposits in the Danish pre-Quaternary succession. Some of these deposits were later cemented into conglomerates. The deposits are common in the fluvial parts of the Billund Formation (Aquitanian) and the basal transgressive lag of the late Aquitanian – Burdigalian Klintinghoved Formation capping the Billund Formation. Questions remained as to the age of these deposits and what they infer about tectonic events in the region. This study reviews the geology of the flint-dominated conglomerates and presents the first dates for a sample of these unique deposits. We observe grain sizes up to 5 cm diameter. Palynological analyses place the sample as early Miocene. Some samples from the area have suggested a local source near active salt structures, associated with the uplift of the pre-Neogene sedimentary successions. We suggest that the common occurrences of flint clasts in the lower Miocene succession reveal significant erosion of Upper Cretaceous and Danian chalk, likely associated with the uplift of the Scandinavian lowlands during the Savian tectonic phase, early Miocene.

scholarly journals Germinative capacity and energy of critically endangered Ojców birch (Betula oycoviensis Besser) in the Czech Republic

2020 ◽  
Vol 66 (No. 6) ◽  
pp. 227-235
Author(s):  
Josef Gallo ◽  
Zdeněk Vacek ◽  
Martin Baláš ◽  
Stanislav Vacek
Keyword(s):  
Czech Republic ◽  
Critically Endangered ◽  
Important Indicator ◽  
The Czech Republic ◽  
Tree Defoliation ◽  
West Bohemia ◽  
Individual Trees

Ojców birch (Betula oycoviensis Besser) is a rare and critically endangered taxon of the genus Betula. Its distribution is limited to few countries in Europe. In the Czech Republic, this taxon, characterized by typical shrubby habitus, has been found in fewer than 70 tree individuals, prevailingly in the studied locality Volyně, West Bohemia. This study was focused on the germinative capacity and germinative energy of this taxon, as it is an important indicator of possible regeneration of the trees in nature and for conservation. Non-stratified seeds (2 200 pcs) and stratified ones (2 200 pcs) were compared to each other and in relation to dendrometric tree parameters. The results showed no significant (P > 0.1) differences between stratification variants in total germination (higher by 0.8% in stratified), though stratification improved germinative energy. Germination was in 1st week higher by 6.0% in stratified variant, respectively marginally (P < 0.1) higher in 2nd week in non-stratified variant. However, both germinative capacity and germinative energy were significantly (P < 0.01) variable between individual trees. The germinative capacity was significantly (P < 0.05) positively correlated with tree defoliation. Tiny seeds and triploid trees exhibited very low and zero germinative capacity and energy, respectively. Totally, seeds exhibited sufficient germinative capacity and germinative energy of 23.1% (0.0–62.5%). This suggests that the trees can be potentially used for this type of Ojców birch regeneration i.e. generatively from seeds, although rather in controlled artificial conditions.

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