Constraining long-term denudation and faulting history in intraplate regions by multisystem thermochronology: An example of the Sudetic Marginal Fault (Bohemian Massif, central Europe)

The Rychlebské hory Mountain region in the Sudetes (NE Bohemian Massif) provides a natural laboratory for studies of postorogenic landscape evolution. This work reveals both the exhumation history of the region and the paleoactivity along the Sudetic Marginal Fault (SMF) using zircon (U-Th)/He (ZHe), apatite fission track (AFT), and apatite (U-Th)/He (AHe) dating of crystalline basement and postorogenic sedimentary samples. Most significantly, and in direct contradiction of traditional paleogeographic reconstructions, this work has found evidence of a large Cretaceous sea and regional burial (to >6.5 km) of the Carboniferous-Permian basement in the Late Cretaceous (~95–80 Ma). During the burial by sediments of the Bohemian Cretaceous Basin System, the SMF acted as a normal fault as documented by offset ZHe ages across the fault. At 85–70 Ma, the basin was inverted, Cretaceous strata eroded, and basement blocks were exhumed to the near surface at a rate of ~300 m/Ma as evidenced by Late Cretaceous–Paleocene AFT ages and thermal modeling results. There is no appreciable difference in AFT and AHe ages across the fault, suggesting that the SMF acted as a reverse fault during exhumation. In the late Eocene–Oligocene, the basement was locally heated to <70°C by magmatic activity related to opening of the Eger rift system. Neogene or younger thermal activity was not recorded in the thermochronological data, confirming that late Cenozoic uplift and erosion of the basement blocks was limited to less than ∼1.5 km in the study area

Basaltic Dyke with Specific Volcanogenic Structures and its geomorphic evolution: Unique Geoheritage of the Faroe Islands (North Atlantic Ocean)

Volcanic landforms resulting from Cenozoic volcanism represent the most peculiar features of global geodiversity and provide eminent narratives for geoeducation. Among them, however, relict volcanic forms and site-specific landforms in remote areas have received less attention. In this paper, we provide the first description of unique volcanogenic features (hereinafter referred to as pseudo-hieroglyphs) developed on a summit rock wall at the Sandfelli ridge near the village of Gjógv in the N Eysturoy Island (Faroe Islands). The geomorphic evolution of the ridge and rock wall during the Quaternary is described and detailed petrographic analyses of the volcanogenic features are provided. Based on observed petrographical features, we interpret the pseudo-hieroglyphs to probably represent unique examples of chaotic horizontal columnar jointing. Following the geomorphological and petrographic examination of the study site, we analyse current Faroese legislation aiming at nature conservation and use this case to discuss broader implications of geoheritage conservation and geotourism in distant regions.Vulkanická krajina vzniklá kenozoickým vulkanismem představuje nejpodivnější rysy globální geodiversity a poskytuje vynikající příběhy pro geovzdělávání. Méně pozornosti se však dostává reliktním vulkanickým formám a lokálním tvarům reliéfu v odlehlých oblastech. V tomto článku přinášíme první popis unikátních vulkanogenních tvarů (dále jen "pseudo-hieroglyfy"), které se vyvíjely na skalní stěně vrcholu na hřbetě Sandfelli u vesnice Gjógv v severní části ostrova Eysturoy (Faerské ostrovy). Je popsán geomorfologický vývoj hřbetu a skalní stěny během kvartéru a jsou uvedeny podrobné petrografické analýzy vulkanogenních vlastností. Na základě pozorovaných petrografických rysů interpretujeme pseudo-hieroglyfy, které pravděpodobně představují jedinečné příklady chaotické horizontální sloupcovité odlučnosti. Po geomorfologickém a petrografickém studiu zájmové lokality analyzujeme současnou faerskou legislativu zaměřenou na ochranu přírody a užíváme tohoto příkladu k diskusi širších důsledků zachování a geoturistiky geografického dědictví ve vzdálených regionech

Ice caves (Podyjí National Park)

Excursion guide deals with the unique site – Ice caves in the western part of the Podyjí National Park. Unloading of bedrock after incision of the Dyje/Thaya R. (and maybe an earthquake) caused rockslides, opening of fissures and formation of several hundred of meters long and tens of meters deep pseudokarst caves. Due to special microclimatic conditions cave ice remains in pseudokarst caves up to August. Quantitative measurements of gravitational movements are carried out in caves and in block fields

To distribution of Quaternary sediments on the Červený kopec (Red Hill) in Brno.

Complex of Quaternary sediments was exposed on the SE slope of the Červený kopec (Red Hill) in the southern part of the Brno city. The Hill bedrock is composed of red quartzose conglomerates and arkoses of Lower Devonian age (“Old Red”). The authors found several bodies of fluvial gravels and sands in the exposure deposited as river terraces by the Svratka river. The highest gravel body (surface cca 241 m, base cca 235 m a.s.l.) can be compared with Tuřany terrace of the Svitava R. dated paleontologically into Danubian Period

Do Organizations Use A Formalized Risk Management Process To Address Social Media Risk?

Social media use within the workplace is widespread; however, little is known about how organizations actually manage social media risk. We use the Committee of Sponsoring Organization\u27s Enterprise Risk Management – Integrated Framework (COSO, 2004) to develop a social media risk management model (SM-RMM) that includes four components: (i) social media use, (ii) perceived risk of use, (iii) policy implementation, and (iv) training and technical controls. We utilize the model to examine whether the manner in which organizations address social media risk is consistent with a formalized risk management process. Survey data from 98 risk management, audit, and finance professionals shows that the extent of organizations’ social media use increases the perceived risk of social media use. In addition, the effect of the extent of use on the implementation of social media policies is greater for organizations with higher levels of perceived risk of use. Finally, organizations with more extensive social media policies have more extensive training and technical controls. The study\u27s findings indicate that organizations are adopting social media policies and controls in a reactive fashion, as opposed to using a formalized risk management process. This may unduly expose organizations to social media risks. Our model provides a framework for future research on social media risk management