The deadline for field trip registration is April 30, 2021. Several weeks before the field trip, you will receive information about field trip organization and contact to field trip leaders. The capacity of field trips is limited and we will serve participants on a “first-come, first-served” basis. Field trip registration must be accompanied by registration for the 35th IAS meeting. Please, be sure that the field trip will take place (as trips may be cancelled if under-subscribed), before purchasing non-refundable travel tickets. Note that some field trips involve travel in other countries than Czech Republic (Austria, Slovakia, Slovenia and Poland) and therefore participants of field trips requiring any visa or special passports should make the necessary arrangements by themselves well in advance. Please check the current pandemic situation and COVID-19 travel requirements in each country. Insurance covering illness or injury is the sole responsibility of each participant. Please note that field trip FT10 is targeted at scientists at the beginning of their career.
To register for the Field Trips please complete the on-line form that is accessible in the user zone - on-line forms
Transportation: public transport; Preliminary number ofparticipants: Minimum 5, Maximum 25
Departure: Prague (17:00); Return: Prague
Includes: field trip guidebook.
Degree of physical difficulty: Low; the trip will include short walks combined with public transport. Trekking shoes are recommended.
Much of the northern part of Prague is built on the erosional edge of the Bohemian Cretaceous Basin. The basal part of the basin fill is one of classical examples of the “Cenomanian transgression” in Central Europe, culminating at the Cenomanian-Turonian boundary. This short trip by public transport will demonstrate a history of a stepwise palaeovalley filling by fluvial and tide-dominated estuarine strata, separated by a variety of transgressive surfaces, and followed by the maximum flooding at the onset of the Turonian which established basinwide hemipelagic conditions. The excursion will be followed by after-party in the stylish Bulovka Brewery.
Transportation: bus; Preliminary number ofparticipants: Minimum 15, Maximum 25.
Departure: Bratislava, Slovakia (9:00); Return: Bratislava
Includes: field trip guidebook, transportation, accommodation, breakfasts, lunch packets, snacks and dinners.
Degree of physical difficulty: Intermediate level of physical fitness is required. The trip will include short walks (within 1km distance), frequently on unpaved quarry floors (trekking shoes are recommended). Hard hats will be provided.
The history of the Central Paratethys will be illustrated by a transect through the Danube, Novohrad-Nógrád (NNB) and the Fiľakovo-Pétervasára basins (FPB). Onset of deposition in the FBS was characterized by deltaic to tide dominated coasts during the early Burdigalian - Ottnangian. These sediments are covered by a rhyolite tuff which represents the Ottnangian-Karpatian boundary (~17.4 Ma). The Karpatian sedimentation in NNB is characterized by middle to outer shelf muds and heteroliths with coal seams and fluvial deposits at the basin margin. They display a gradual decrease in salinity, possibly induced by the closure of the Western Paratethys. Marine deposition occurs again in the early Badenian – Langhian. In the NNB, sandy tidal facies were deposited. Badenian marine environments in the Danube Basin reached from inner shelf settings with Lithotamnium reefs to stable submarine plateau muds. The demise of the fully marine setting took place at the end of the Badenian stage - Serravallian (Badenian–Sarmatian extinction event). The depositional environments soon changed to brackish and fluvio-deltaic. Andesite tuffs produced at that time serve as marker beds. The Sarmatian is characterized by see-grass meadows, marshes and sandy deltas that spread along the basin margin.
Transportation: bus; Preliminary number ofparticipants: Minimum 13, Maximum 30
Departure: Ljubljana, Slovenia (8:00); Return: Ljubljana
Includes: field trip guidebook, transportation in Slovenia, accommodation, breakfasts, lunch packets, snacks and dinners. Lunch is not included in the price first day (stop in restaurant scheduled).
Degree of physical difficulty: basic to intermediate level of physical fitness is required. The trip will include short (up to few km long) walks; frequently on unpaved floors (trekking shoes and walking sticks are recommended).
Mass movements represent important processes that shape the surface of the Earth. This trip will present an overview of recent and ancient mass movements in variety of different settings: from recent slope processes to Mesozoic massive submarine platform collapses. Holocene: Tamar and Soča valleys are alpine valleys filled with Holocene rock falls, landslides, debris-flows, mudflows and fluvial deposits. They are forming talus slopes, alluvial and debris-flow fans, each of them with a complex history of sedimentation and erosion. Quaternary: Vipava valley represents a ‘’tectonic’’ topography with steeply deeping Mesozoic carbonates thrusted over gently-sloping Palaeogene flysch. This facilitated the formation of complex Quaternary sedimentary slope system (debris-flows, scree, mud-flows, rock avalanches, rotational and translational landslide). At the Adriatic coast ongoing cliff evolution will be observed. Mesozoic-Cenozoic: In the middle Soča Valley we will observe three ancient mass movement deposits. Carnian extensional blocky breccia with up to 300m large blocks was deposited in the toe-of-slope. Middle Jurassic basinal blocky limestone breccia that documents the transition to compressional regime. Paleogene up to 250m thick massive blocky breccias related to thrusting and foreland basin formation
Transportation: bus; Preliminary number ofparticipants: Minimum 20, Maximum 50
Departure: Schladming, Austria (9:00); Return: Schladming
Includes: field trip guidebook, transportation, accommodation, breakfasts, lunch packets, snacks and dinners.
Degree of physical difficulty: Proper clothing and supplies are needed for the outdoors, mostly in mountainous areas (e.g., mountain boots, hat, wind breaker and sunscreen). Notify that it can be cold. The trip includes hiking in mountainous areas. Participants are advised to check local weather forecasts.
In the central Northern Calcareous Alps, the Triassic passive continental margin evolution of the Western Tethyan realm is characterized by the demise and aftermath of three shallow-water carbonate ramp/platform cycles. Beyond the siliciclastic dominated Early Triassic sedimentation, intense shallow-water carbonate production started around the Early/Middle Triassic boundary, deposited first under restricted and later under more open-marine conditions. The Late Anisian break-up of the Neo-Tethys Ocean led to the drowning of this shallow-water ramp. In the Late Ladinian shallow-water carbonates re-established and resulted in the complex Ladinian to early Carnian platform - basin pattern. Later in the Carnian, after the partial drowning of this platform by siliciclastic input the shallow-water carbonate production restarted and established the huge Norian Hauptdolomit/Dachstein Carbonate Platform with its classical lagoonal sediments, reef belt, and its transition to the open shelf area. In the Rhaetian the carbonate factories were influenced by siliciclastic input, forming a deep lagoon. At the Triassic/Jurassic-boundary shallow-water carbonate production ended, the platform drowned. Beside all sedimentological features, controlling factors of platform demise can be discussed as ocean acidification, climate changes, stepwise mass extinctions and sea-level fluctuations.
Includes: field trip guidebook, transportation, accommodation, breakfasts, lunch packets (second and third day) and dinners. Lunch is not included in the price first day (stop in restaurant scheduled).
Degree of physical difficulty: Intermediate level of physical fitness is required. The trip will include short walks (trekking shoes are recommended).
The Central Sudetes are the northern peripheral part of the Bohemian Massif. The two most important regional structural units - the Intrasudetic Synclinorium and the Upper Nysa River Trough - represent the principal depocentres. The former began to form in the early Carboniferous and the latter in the late Cretaceous. The two units form an interconnected geodynamic system, the connecting element of which is the Intrasudetic Shear Zone. Both units are complementary elements of the Permian and Cretaceous palaeogeographic patterns and both demonstrate a consistently extensional development, as recorded in the basin architecture, the type and distribution of sedimentary palaeoenvironments and in the structure of their today's sedimentary cover. Permian sediments are predominantly a volcanic-sedimentary complex, with an excellently preserved record of the basin frame-related alluvial fan sediments and intrabasinal river and lake sediments, with distinct soil horizons including calcrete and with numerous remains of inland fish and arthropods, as well as traces of early reptiles. Cretaceous sediments document the Cenomanian marine transgression and cyclic infilling of both depocentres, as well as their thermal history and exhumation stage. Remarkable is the facies record of the syndepositional active formation of the marine basin-floor topography, with underwater accumulation terraces and relic distributary channels of the coastal/shelf system of clastic sediment delivery. Unique features include traces of methane migration in marine sediments. The phenomena of particular interest, both in the Permian inland sediments and in the Cretaceous marine sediments, include seismotectonic deposits and structures, which constitute an excellent record of synsedimentary geodynamic activity in the Central Sudetes.
Transportation: bus; Preliminary number ofparticipants: Minimum 18, Maximum 24
Departure: Prague (8:00); Return: Prague
Includes: field trip guidebook, transportation, accommodation, breakfasts, lunch packets, snacks and dinners.
Degree of physical difficulty: moderate; unsuitable for those fearful of heights.
The Bohemian Cretaceous Basin combines features of a tectonically active basin with those of an epeiric seaway flooded during the mid-Cretaceous sea-level maximum. Scenic, large-scale exposures and active quarries, supplemented by a rich subsurface database, make this basin a true natural laboratory for the study of the Cretaceous of Central Europe. The trip focuses on a time interval of the Turonian, bracketed by two major events in the basin evolution occurred: the Late Cenomanian to early Turonian flooding of the Bohemian Massif, and the deposition of coarse-grained deltas in response to tectonic and eustatic events spanning the Turonian-Coniacian boundary. The trip leaders will present a broad, multi-disciplinary view of the depositional record, combining consideration of physical processes of deposition in sand-rich deltaic through offshore settings with sequence stratigraphy, stable isotope chemostratigraphy and a detailed biostratigraphic framework. Intrabasinal correlations of offshore and nearshore settings, sediment dispersal processes on delta slopes and in the offshore part of the seaway, as well as global correlation issues of relative sea-level change will be discussed.The main part of the trip will be devoted to a unique transect from upper Turonian-early Coniacian nearshore deltaic sandstones, exposed in the sandstone landscape of the Turnov region, into time-equivalent offshore mudstones and marlstones, will be examined. A core workshop will supplement the discussion of facies and processes in the deltaic system. A detailed framework of sequence stratigraphy, bio- and isotope stratigraphy linked to an astrochronological age model will be demonstrated. Contrasting types of shallow-water, coarse-grained deltaic systems formed during mid-Turonian relative sea-level lows will be discussed. Depending on accessibility of active quarries (currently closed due to COVID measures), a stop to examine a transgressive valley-fill through open-shelf succession may be included.
Transportation: bus; Preliminary number ofparticipants: Minimum 13, Maximum 25
Departure: Prague (8:00); Return: Prague
Includes: field trip guidebook, transportation, accommodation, breakfast, lunch packets, snacks and dinners.
Degree of physical difficulty: Intermediate level of physical fitness is required. The trip will include short walks (within 1km distance), frequently on unpaved quarry floors (trekking shoes are recommended).
Devonian carbonate-siliciclastic ramp successions of the Prague Basin (Teplá – Barrandian Unit, Bohemian Massif) represent the type strata for several globally recognized bioevents – overturns in pelagic and benthic faunal assemblages: basal Zlíchov Event, Daleje E., Choteč E. and Kačák E., all named after the local stratigraphic units. These bioevents are coupled with distinct facies shifts along the carbonate ramp bathymetric profile and, consequently, were presumably linked to carbonate production and relative sea-level changes during the early – middle Devonian peak greenhouse climate. The Devonian strata are well exposed in many >100-m-thick sections in a number of old/active quarries which can be correlated using outcrop gamma-ray logs thus provide a very good insight into the facies architecture of the carbonate ramp systems. The field trip will focus on facies variability along the ramp bathymetric profile in 15 stops ranging from coral-bryozoan reef flank deposits through crinoidal banks, storm deposits, mass-flow breccias and carbonate turbidites to nodular pelagic limestones and shales. The facies stacking patterns and unconformities will be discussed with biostratigraphy, gamma-ray based basin-wide correlation (including practical demonstration of field GR logging), carbonate microfacies, element geochemistry and carbon isotope geochemistry into an integrated sequence-stratigraphic interpretation. The age range of the stops encompasses Lochkovian to Givetian stages, including two GSSPs localities for the base of Lochkovian (Klonk) and the base of Pragian stage.
Transportation: bus; Preliminary number ofparticipants: Minimum 15, Maximum 25
Departure: Prague (6:00); Return: Prague
Includes: field trip guidebook, transportation, accommodation, breakfasts, lunch packets, snacks and dinners.
Degree of physical difficulty: Intermediate level of physical fitness is required. The trip will include short walks (trekking shoes are recommended). Hard hats will be provided.
A three-day traverse will provide a full overview of the development of the Variscan Moravo-Silesian Basin, from pre-orogenic to post-orogenic deposition. The sedimentary successions are parts of the Rhenohercynian Zone of the Varsican belt and represent a counterpart of the German Rhenish Mountains. The main motive of first two days of the field-trip will be gravity-flow facies, from uppermost Devonian calciturbidites to Viséan-Serpukhovian synorogenic silciclastic turbidites. During the first day, Famennian and Tournaisian pre-orogenic calciturbidites of the Moravian Karst and syn-orogenic Culmian facies of the Drahany Upland in the vicinity of Brno city will be inspected. Second day will be dedicated to the Culmian facies of the Nízký Jeseník Mountains. Various types of turbidites and debrites of the foreland basin will be studied in several quarries and road-cuts. The history of extensive slate mining since the Middle Ages in the ‘Slate Country’ of the Nízký Jeseník region will be shown in the Slate museum of Budišov nad Budišovkou. The field trip will end with a visit of the coal-bearing paralic succession in the region of Ostrava that was deposited in the final “molasses-stage” of the Variscan orogeny in the Upper Silesian Basin.
Transportation: bus; Preliminary number ofparticipants: Minimum 15, Maximum 20
Departure: Prague (7:30); Return: Prague (departure and return to Prague every day)
Includes: field trip guidebook, transportation, lunch packet. Accommodation in Prague is not included.
Degree of physical difficulty: Intermediate level of physical fitness is required. The trip will include short walks (trekking shoes are recommended). Hard hats will be provided.
Late Pennsylvanian to Triassic Bohemian Massif basins form a complex of intermontane basins on top of the collapsed Variscan orogen's interior. Central and Western Bohemian basins share a similar sedimentary record and stratigraphy and thus likely comprise several once interconnected depocenters. Individual basins developed as grabens and half-grabens filled by fluvial to lacustrine successions, intercalated with several ash-fall tuff horizons between c.314 and 297 Ma (latest Duckmantian to middle to late Autunian). During the 1st day of field trip, architectures and facies of different fluvial styles will be examined. Controls on development of fining upward fluvial cycles and paleoclimate record in associated clastic paleosols will be discussed. Fine-grained, organic- rich clastics of a relatively deep-water lacustrine system with prodelta turbidites and lobes will be demonstrated. The 1st day will end with a tour of the Pilsner Urquell brewery that uses water from Pennsylvanian arcose aquifers for brewing its world-class beer. Second day will be focused on Krkonoše Piedmont Basin in the northern Bohemian Massif. The evolution of Late Pennsylvanian to Triassic paleoenvironments and paleoclimates will be discussed on various localities of fluvial sandstones, lacustrine black shales, alluvial fan conglomerates and aeolian sandstones. Basin also underwent several phases of postsedimentary deformation and uplift, so Permian to Quaternary basin inversion will be also discussed.
CANCELLED FT9: The Ohře River: under anthropogenic pressure(Czech Republic; 2 days, from June 16 to 17, 2021; Trip leaders: Faměra M., Hošek M., Elznicová J., Kiss T., Matys Grygar T.)
CANCELLED FT10: Silurian and Devonian deposits in the Daleje and Prokop valleys (SW of Prague) • intended for early career scientists only(Czech Republic; 1 day, June 17, 2021; Trip leaders: Vodrážková, S., Weinerová, H., Chadimová L., Nádaskay, R.)
Transportation: public transport; Preliminary number ofparticipants: Minimum 5, Maximum 15
Departure: Prague (17:00); Return: Prague
Includes: field trip guidebook
Degree of physical difficulty: basic to intermediate level of physical fitness is required. The trip will include short (up to few km long) walk, frequently on unpaved floors (trekking shoes are recommended).
Devonian deposits form a picturesque scenery in Hlubočepy, one of the best preserved historical areas of Prague that has maintained its unique rural character over decades. It is also a classic geological site known since the time of Joachim Barrande. Here we will explore Lower and Middle Devonian offshore deposits that reflect interpreted eustatic sea-level fluctuations and other palaeoenvironmental events in their development, such as the Basal Choteč and Kačák events familiar to stratigraphers of the Devonian. Lithofacies examined will range from (hemi)pelagic shales and carbonates through calciturbidites to siliciclastic flysch-like deposits, representing the youngest, pre-Variscan infill of the Prague Basin.
