DOCSLIB.ORG

Cretaceous Thrusting in the Western Part of the Northern Calcareous Alps (Austria) - Evidences from Synorogenic Sedimentation and Structural Data

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Cretaceous Thrusting in the Western Part of the Northern Calcareous Alps (Austria) - Evidences from Synorogenic Sedimentation and Structural Data ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Austrian Journal of Earth Sciences Jahr/Year: 2001 Band/Volume: 94 Autor(en)/Author(s): Ortner Hugo Artikel/Article: Cretaceous thrusting in the western part of the Northern Calcareous Alps (Austria) - evidences from synorogenic sedimentation and structural data. 63-77 © Österreichische Geologische Gesellschaft/Austria; download unter www.geol-ges.at/ und www.biologiezentrum.at Mitt. Osterr. Geol. Ges. i ISSN 0251-7493 94(2001) 63-77 Wien, August 2003 Northern Calcareous Alps thrust sequence ramp-flat-model strain partitioning ^. .. _•_••.• . .,_* Vorarlberg, Tirol, Salzburg Cretaceous thrusting in the western part of the Northern Calcareous Alps (Austria) - evidences from synorogenic sedimentation and structural data HUGO ORTNER1 8 Figures Content Abstract 63 1. Introduction 63 1.1 Relationship between synorogenic sediments and thrusting 65 2. Nappe geometries and age of synorogenic sediments in the western Northern Calcareous Alps 67 2.1 The Lechtal and Allgäu nappes 67 2.2 The Inntal Nappe 69 2.2.1 Post Nappe-stacking movements 71 2.3 The Thiersee thrust 71 2.4 The Achental thrust 71 2.5 The Berchtesgaden nappe complex 73 3. Discussion 73 4. Conclusions 75 5. Acknowledgements 75 References 75 Abstract The application of a simple ramp-flat model to Cretaceous nappe stacking in the Northern Calcareous Alps and its relation to synorogenic sedimentation allows to assess the large scale geometry of the nappe stack. Different synorogenic formations are related to specific positions within the ramp-flat model: Gosau and Branderfleck Fms. are found on the hangingwall anticlines of the Inntal and Lechtal nappes, respectively, Losenstein and Tannheim Fms. on the upper footwall flat of the Lechtal thrust and the Lech Fm. on the upper footwall flat of the Inntal thrust. The youngest sediments deposited on the upper footwall flat give an approximate age of thrusting, and therefore a sequence of thrusting can be deduced from the ages of synorogenic sediments. Generally, thrusting propagates from the S(E) to the N(W): the oldest thrust at the end of the Barremian is the Juvavic thrust, followed by the Lechtal thrust in the Aptian/Albian. The Inntal thrust in the Albian/Cenomanian is out-of-sequence, followed by thrusting of the Allgäu and Lechtal nappes onto the Cenoman- Randschuppe and Arosazone after the Turanian. Contemporaneous N-directed thrusting in the Northern Calcareous Alps and west- directed thrusting in the southern part (Achental thrust) and in the basement of the Northern Calcareous Alps call for a model of strain partitioning along deep reaching E-W-striking faults near the southern margin of the Northern Calcareous Alps. 1 Introduction Thrusting was accompanied by synorogenic sedimenta­ tion. In the Northern Calcareous Alps, a complete sedi- The Northern Calcareous Alps are a thin-skinned fold- mentary succession from the Jurassic to the end of the and-thrust belt along the northern margin of the Aus- Oligocene is present, covering the whole time of deforma- troalpine nappe pile (Fig. 1). The thrust architecture of the tion. This paper reevaluates the timing of nappe stacking Eastern Alps is a result of polyphase thrusting (and normal in the western Northern Calcareous Alps in the light of faulting) in different directions (e. g. FROITZHEIM et al. 1994; sedimentation ages and geometries of synorogenic de- EISBACHER and BRANDNER, 1996; NEUBAUER et al., 2000). posits. Address of the author 1 Hugo ORTNER, Institut für Geologie und Paläontologie, Universität Innsbruck, Innrain 52, A-6020 Innsbruck, E-Mail: [email protected] © Österreichische Geologische Gesellschaft/Austria; download unter www.geol-ges.at/ und www.biologiezentrum.at lower plate units (Helvetic, Penninic) ^rxßö-* * , • >genesedTmeffis| upper plate units (Austroalpine, #^Lff- ,-Upper; >ine sedTmentersTraverl Southern Alps) r -^^Br\ Upper A' v qrade metemo^h'ic'basemenl ]J Lower —— v.- , . Molasse Basin 8 : •.•••:• •••.•. >• . .•':• •. 47° Fig. 1 Simplified geological overview of the Eastern Alps. Thick black lines delineate young (Oligocene and Miocene) faults. © Österreichische Geologische Gesellschaft/Austria; download unter www.geol-ges.at/ und www.biologiezentrum.at Cretaceous thrusting in the western part of the Northern Calcareous Alps (Austria) - evidences from... 65 The existence of far-travelled nappes in the Northern Cal­ the closure of the Hallstatt-Meliata ocean (GAWLICK et al., careous Alps was subject of a long-lasting controversy (for 1999). a review, see TOLLMANN, 1986). Generally the nappe theory Prior to deformation the Northern Calcareous Alps formed in the Northern Calcareous Alps was accepted since the part of the southeastern passive continental margin of the late 1960s, however observations from some areas (Zugs­ Penninic Ocean. Sedimentation was characterized by deep pitze, Wetterstein mountains; MILLER, 1963) are not fully marine calcareous and siliceous deposits. Synorogenic consistent with a model of large distance NNW-directed sedimentation developed continuously from Jurassic-Early thrusting (TOLLMANN, 1976). West of the Inn Valley, the mod­ Cretaceous passive margin deposits and is characterized el proposed for the Northern Calcareous Alps suggests a by an increase in siliciclastic detritus and occurrence of main nappe body ("Stammdecke" = Lechtal nappe; TOLL- ophiolithic detritus (Lech Fm„ Losenstein Fm„ Schrambach MANN, 1976). The Allgäu Nappe and the Cenoman-Rand- Fm., Roßfeld Fm., Lackbach Fm.). These deposits are often schuppe in the north form frontal imbricates, the Inntal overlain by the thrust units. Upper Cretaceous to Paleogene nappe at the southern margin of the western Northern Cal­ synorogenic deposits (Branderfleck Fm., Gosau Group) careous Alps is thought to represent a trailing imbricate of overly the locally deeply eroded Triassic to Early Cretaceous the Lechtal nappe. East of the Inn Valley, the main nappe rocks with an angular unconformity. The Gosau Group and body is the Tirolic nappe, equivalent to the Inntal nappe. At Branderfleck Fm. are mixed carbonatic-siliciclastic succes­ its southern margin, the Tirolic nappe is still in contact with sions starting with terrestrial and shallow marine deposits, its basement, the Greywacke Zone. The Lower and Upper respectively. Juvavic units are two tectonically higher nappe units. The age of nappe stacking in the Northern Calcareous Alps was generally assumed to be the boundary between Early and 1.1 Relationship between synorogenic Late Cretaceous (e. g. FLÜGEL et al., 1987; TOLLMANN, 1987; sediments and thrusting OBERHAUSER, 1995). In the last few years, another Upper A simple ramp-flat model illustrates what to expect during Jurassic event of nappe stacking was described, related to concurrent sedimentation and thrusting in a marine basinal N s Gosau sedimentation (Late Cretaceous) Late stage CO ..level of erosion 3 ififcr-- "'* -COL ilijljjlllij'^ •o CD c Urgonian carbonate platform Early stage c (Early Late Cretaceous) sea |eve| J*: structure growing C/3 Late stage _C '-!—> Gosau sedimentation (Late Cretaceous) CO . level of erosion i. 3 CD C Early stage Urgonian carbonate platform c (Early Late Cretaceous) sea |eve| structure growing CO o lllillilP^^ Fig. 2 Model used to illustrate the effects of thrusting on synorogenic sedimentation. Numbers refer to different structural domains that can be identified in the field (for explanation, see text). The early stage of thrust evolution shows a situation not preserved due to subsequent erosion. However, pebbles from lower Cretaceous carbonate platforms are frequently found in lower Cretaceous basinal deposits and Upper Cretaceous conglomerates (e. g. SCHU\GINTWEIT, 1991). © Österreichische Geologische Gesellschaft/Austria; download unter www.geol-ges.at/ und www.biologiezentrum.at g Jurassic rocks Raibl Fm. Muschelkalk Group Kössen Fm. Wetterstein Fm. Hauptdolomit Fm. 1km Partnach Fm. h t JliilllllgllPlHfH?llllflf?|lll|lS:?' ...... --• ,v ^ ^'^atPsaiÄsssliäillsiisiiss^ap fI«113BrM§ Fig. 3 N-S cross section from the frontal part of the Lechtal nappe, redrawn from MÜLLER-WOLFSKEIL and ZACHER (1984), illustrating the truncation of N-vergent folds by the Lechtal thrust (top). Unfolding of the thrust does not eliminate the folds (bottom). For location of cross section see Fig. 4 © Österreichische Geologische Gesellschaft/Austria; download unter www.geol-ges.at/ und www.biologiezentrum.at Cretaceous thrusting in the western part of the Northern Calcareous Alps (Austria) - evidences from... 67 setting (Fig. 2). The frontal part of the thrust unit starts to nappe over the Allgäu nappe) disappears in a tight anticline climb up the ramp and travel across the flat. Therefore, the (MAY and EISBACHER, 1999) and Upper Triassic rocks form age of the youngest deposits below the thrust records the the base of the Lechtal Nappe. The oldest rocks of the age of onset of thrusting. Growth of the hangingwall anti­ Allgäu nappe are Upper Triassic in age. Tight to isoclinal cline leads to a relative sea level fall on top of the fold. As a ENE-WSW trending folds in the Lechtal nappe are truncated consequence, shallow marine conditions lead to carbonate by the Lechtal thrust (TOLLMANN 1976, MÜLLER-WOLFSKEIL platform growth or at least to development of small biogenic and ZACHER 1984; Fig. 3), and all folds are coaxial. In the buildups above the structure. Continued growth of the footwall of
Load more

Recommended publications
  • Hiking and Climbing Your Personal Karwendel
    Around the top station Hiking and climbing Your personal Karwendel experience Prices Summer 2017 A visit to the nature information centre is part of any ex- The top station of the Karwendel cable car is an ideal Whether it’s a family outing at the weekend or a moun- cursion in the Karwendel. The “giant telescope” projects starting point for tours into the Northern Karwendel tain hike with friends there are lots of possibilities. For Return Single spectacularly over the cliff edge towards Mittenwald with range. Alongside enjoyable walking paths for the whole that really special experience you can even get married, Adults € 27.50 € 17.50 a view of the breathtaking 1,300m drop over the wide family there are also challenging via ferrata for adrena- hold a conference or celebrate your birthday at 2,244m. Youths / Children € 17.50 € 12.50 Isar valley. Inside you can find out many interesting facts line junkies. about the Karwendel, the largest nature reserve of the Alongside regular public events of the Karwendelbahn AG Directly at the top station, the Passami path leads around Family discount for parents with their children Eastern Alps and the natural habitat for animals and fauna. such as our New Year’s or Easter brunch we can organise the Karwendel basin. This panoramic path is ideal to get your own personal festival. We would be glad to send you (6 to 17 years old) The nature information centre “Bergwelt Karwendel” is a breathtaking view of the impressive Karwendel in the a customised offer for your celebration, conference, group 2 adults + 2 adults + 2 adults + 2 adults + open during the regular operating times of the Karwendel shortest possible time.
    [Show full text]
  • 51 20 Sommerfaltkarte EN.Indd
    Want to see the towns and villages on the map? Please turn over! 1 Good to know 2 Region & people 1.1 Tourism Boards Long-distance hiking MTB Climbing Families X 1.2 Travelling to Tirol 2.1 Tirol‘s Mountains XX 2.3 Food & Drink Telephone number & Towns and villages in this region e-mail address Webseite Region good for ARRIVING BY TRAIN coming from Switzerland Tirol is a land of mountains, home to more than 500 summits International Intercity via St. Anton am Arlberg. over 3,000 metres. The northern part of Tirol is dominated by 1 Achensee Tourismus Achenkirch, Maurach, Pertisau, +43.5246.5300-0 www.achensee.com trains run by the ÖBB Drivers using Austrian the Northern Limestone Alps, which include the Wetterstein Steinberg am Rofan [email protected] (Austrian Federal Rail- motorways must pay a and Kaiser Mountains, the Brandenberg and Lechtal Alps, the ways) are a comfortable way toll charge. Toll stickers Karwendel Mountains and the Mieming Mountains. The Sou- 2 Alpbachtal Alpbach, Brandenberg, Breitenbach am Inn, +43.5337.21200 www.alpbachtal.at to get to Tirol. The central (Vignetten) can be bought Brixlegg, Kramsach, Kundl, Münster, Radfeld, [email protected] thern Limestone Alps run along the borders with Carinthia Rattenberg, Reith im Alpbachtal train station in Innsbruck from Austrian automobile and Italy. They comprise the Carnic and Gailtal Alps as well serves as an important hub associations as well as at as the Lienz Dolomites. The Limestone Alps were formed long 3 Erste Ferienregion Aschau, Bruck am Ziller, Fügen, Fügenberg, +43.5288.62262 www.best-of-zillertal.at im Zillertal Gerlos, Hart, Hippach, Hochfügen, Kaltenbach, [email protected] and so do the stations at petrol stations and border ago by sediments of an ancient ocean.
    [Show full text]
  • Get on Your Bike!
    Mountain bike and cycling tours Get on your Bike! www.alpenwelt-karwendel.de/enBiking in Alpenwelt Karwendel 1 Welcome to _________________________________________________ Welcome - Presenting Alpenwelt Karwendel Page 3 _________________________________________________ Adventure in the mountains - Mountain bike tours Page 4 _________________________________________________ Easy tour Enjoyment and family - Trekking bike tours Page 18 _________________________________________________ Explore the region - Racing bike tours Page 26 _________________________________________________ Medium tour Cycling with a tail wind - E-bike tours Page 30 _________________________________________________ Better orientation - Alpenwelt overview Page 32 _________________________________________________ Difficult tour Good to know - Information for cyclists Page 34 _________________________________________________ Each of these tours can be started from all three municipalities in Alpenwelt Karwendel. Welcome to Alpenwelt Karwendel! These two mountain bikers have had a good laugh. They are returning from a break at Vereiner Alm. In the deep south of Germany, at the border with Austria, a pleasant valley with undula- ting meadows, lakes and streams extends between rocky peaks, forested mountain flanks and hills. Alpenwelt Karwendel with the three Upper Bavarian municipalities of Mittenwald, Krün and Wallgau is surrounded by four mountain massifs: the Karwendel mountains and the Soiern group to the East, the Ester mountains to the North and the Wetterstein mountains to the South-West. Because of this, the region is the ideal starting point for all kinds of mountain bike and cycling tours. If you like to take it easy, you can linger in the valley between the flower meadows, lakes and the expansive river landscape of the Isar with its shingle and gravel banks. If you prefer the forested foothills, explore the Ester mountains and the Soiern group with their shady forest roads and single trails.
    [Show full text]
  • Mineralogical Composition of the Baumkirchen Lacustrine
    ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Austrian Journal of Earth Sciences Jahr/Year: 2017 Band/Volume: 110_1 Autor(en)/Author(s): Barrett Samuel, Schmidmair Daniela, Spötl Christoph Artikel/Article: Mineralogical composition of the Baumkirchen lacustrine sequence (Würmian, Inn Valley, Tyrol): provenance and palaeogeographical implications 43-56 Austrian Journal of Earth Sciences Vienna 2017 Volume 110/1 43 - 56 DOI: 10.17738/ajes.2017.0004 Mineralogical composition of the Baumkirchen lacustrine sequence (Würmian, Inn Valley, Tyrol): provenance and palaeogeographical implications Samuel BARRETT1)*), Daniela SCHMIDMAIR2) & Christoph SPÖTL1) 1) Institute of Geology, University of Innsbruck, Innrain 52, A-6020 Innsbruck, Austria; 2) Institute of Mineralogy and Petrography, University of Innsbruck, Innrain 52, A-6020 Innsbruck, Austria; *) Corresponding author, [email protected] KEYWORDS Würmian; Alps; provenance; palaeogeography; Pleistocene; palaeolake Abstract The Baumkirchen palaeolake sequence east of Innsbruck, Tyrol, is a well-known and studied Late Pleistocene sequence of key im- portance for Alpine Quaternary stratigraphy. Recent luminescence dating and geochemical analysis revealed that the sequence is made up of two compositionally slightly different phases representing sedimentation during Marine Isotope Stages (MIS) 3 and 4 separated by a ca. 7-15 ka-long hiatus. We investigated the bulk mineralogical composition of the sediment to better characterise the compositional differences, and analysed modern stream sediments to constrain the provenance from different catchments. The modern stream sediments closely match expectations based on catchment geology besides an overrepresentation of dolomite in several catchments, likely attributable to the greater sediment generation potential of dolostone based on its physical and petro- graphic properties.
    [Show full text]
  • Magic Alpine World
    experience wintertime Magic Alpine World www.alpenwelt-karwendel.de/enWinter in AlpenWelt KArWendel 1 Welcome Winter Diversity in the winter, when a blanket of sparkling dia- monds covers the unique valley landscape between the three Upper Bavarian municipalities of Mittenwald, Krün and Wallgau, Alpen- welt Karwendel entices with a variety of attractions. How about an idyllic winter hike, for example, on sunny, cleared and well signposted routes through the dreamy isar meadows or the deep snow covering the undulating meadows? Here, holidaymakers can let their spirits run free or follow the 150-kilometre cross-country ski trail network in the valley to refuel on freshness and fitness for everyday life.i f you would like to leave a trail in the pristine winter landscape, you can set off on snow- shoes or touring skis for the surrounding upper alpine summits. if you like something a little more relaxing, you will be in good hands at the Kranzberg family ski area with its many beautiful views. tobogganing, ice skating, Bavarian curling, biathlon, traditional Christmas markets and carnival parades are just a small taste of everything there is to discover in Alpenwelt Karwendel. Convince yourself: either by reading this brochure or at the location itself. We look forward to your visit! Welcome in the unspoilt winter landscape around Mittenwald, Krün and Wallgau, holidaymakers can Winter Diversity rest and relax. _________________________________________________ Welcome - Winter diversity page 2 _________________________________________________
    [Show full text]
  • Role of High-Angle Faults During Heteroaxial Contraction, Inntal Thrust Sheet, Northern Calcareous Alps, Western Austria
    Festschrift zum 60. Geburtstag von Helfried Mostler Geol. Paläont. Mitt. Innsbruck, ISSN 0378-6870, Bd. 20, S. 389^06 ROLE OF HIGH-ANGLE FAULTS DURING HETEROAXIAL CONTRACTION, INNTAL THRUST SHEET, NORTHERN CALCAREOUS ALPS, WESTERN AUSTRIA Gerhard Eisbacher & Rainer Brandner With 7 figures Abstract: During Late Cretaceous/two-stage contraction of sedimentary strata within the Austroalpine accretionary wedge initial fold-thrust detachment and subsequent heteroaxial shortening were controlled by low-strength stratigraphie heterogen- eities and by the propagation of transverse high-angle faults. For the Inntal thrust sheet of the Northern Calcareous Alps (NC A) about 20 km of NW-directed thrust movement was accompanied by internal shortening and by distributed dextral displacement along NW-striking transfer faults by about 15 to 20 km. Thrust sheet segmentation along high- angle transfer faults led to significant relief between stratal panels of variable vergence and accounts for local depositi- on in and patchy preservation of Upper Cretaceous syndeformational clastic basins. One of the authors (R.B.) inter- prets orogen-parallel striking normal faults with Upper Cretaceous scarp breccias as an indication of today's NW-SE extension of the early alpine nappe edifice. Superimposed NNE-SSW-oriented heteroaxial contraction in latest Cretaceous-Paleogene time by about 10 km reac- tivated initial transfer faults as high-angle reverse faults, with a new set of NE-striking high-angle sinistrai faults pro- pagating from the footwall into the frontal Inntal hangingwall. This increased the plunge of pre-existing folds and pro- duced a new set of plunging folds within fault-bounded panels. High-angle faults thus accommodated polyphase shor- tening of the NCA-wedge and superimposed basins that formed along transverse zones with major structural relief.
    [Show full text]
  • Nature with All Our Hearts. Die
    rwendel ka lpenwelt A Nature with all our hearts. die Visitor‘s Card included in the visitor’s card Karwendelbad* (indoor swim- the hiking bus (May – Oct) and if you stay 3 nights or more is ming pool). the ski bus (Christmas – March) one free one way ride with the can be used free of charge duri- Kranzberg chairlift* and one ng the whole week. (*except during closure and inspection free entrance fee for the times) tourist-information tourist-information tourist-information Mittenwald Krün wallgau dammkarstr. 3 Schöttlkarspitzstr. 15 Mittenwalder Str. 8 82481 Mittenwald 82494 Krün 82499 wallgau ® tel. + 49 (0) 88 23 - 33 981 tel. + 49 (0) 88 25 - 10 94 tel. + 49 (0) 88 25 - 92 50 50 Fax + 49 (0) 88 23 - 27 01 Fax + 49 (0) 88 25 - 22 44 Fax + 49 (0) 88 25 - 92 50 66 [email protected] [email protected] [email protected] www.mittenwald.de www.kruen.de www.wallgau.de ideas for your vacatioN www.alpenwelt-karwendel.de www.alpenwelt-karwendel.deAlpenwelt KArwendel :: 2 Welcome e com el w a warm welcome… to the Alpenwelt Karwendel! Here in the upper valley of the isar Bavaria your host’s… provide diversity and quality – pulls out all the stops. not only will you find a splendid mountainous nature and down to earth customs experience Bavaria hospitable side. of the region, but also likeable inhabitants who are deeply rooted with nature and their customs. Visitors were always very welcome. Be against a healthy portion of mountain Many of the host’s proudly show their very sought after seal it the romans, salesmen or pilgrims in flair and enjoy your stay in an area where of quality, this stands for best service during your stay and former times then nowadays we see more “nature comes from the heart”.
    [Show full text]
  • Field Trip 8 Innsbruck´S Geology in a Nutshell: from the Hafelekar to the Hötting Breccia 215-228 Geo.Alp, Vol
    ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Geo.Alp Jahr/Year: 2016 Band/Volume: 013 Autor(en)/Author(s): Krainer Karl, Meyer Michael Artikel/Article: Field trip 8 Innsbruck´s geology in a nutshell: from the Hafelekar to the Hötting Breccia 215-228 Geo.Alp, Vol. 13 2016 215 - 228 Field trip 8 Innsbruck´s geology in a nutshell: from the Hafelekar to the Hötting Breccia Karl Krainer1 and Michael Meyer1 1 Institute of Geology, University of Innsbruck, Innrain 52, 6020 Innsbruck 1 Introduction Alpen, southwest of Innsbruck Stubaier Alpen and north of Innsbruck Karwendel as part of the Hafelekar Spitze provides an excellent panora- Northern Calcareous Alps. mic overview of the main geologic units around The excursion starts at the cable railway station Innsbruck. The city of Innsbruck is located on an Hungerburgbahn next to the Innsbruck Congress alluvial fan which was formed by the Sill river at Centre (Fig. 1). The Hungerburgbahn will bring us its confluence with the Inn river. The mountain onto the Hungerburg terrace (868 m), from there group southeast of Innsbruck is termed Tuxer we continue with a cablecar (Seegrubenbahn ) to Fig. 1: Map showing excursion route to Hafelekar Spitze (Wetterstein Reef Complex) and Hungerburg – Alpenzoo (Hötting Breccia). 215 Figure 1 Seegrube (1905 m) and ascend Hafelekar (2260 m) composed of the famous Höttinger Breccie (see . via a second cablecar. From the top station of the excursion route part 2 – the Hötting Breccia) Hafelekarbahn the excursion route follows the The Valley which extends from Innsbruck to the trail to Hafelekar Spitze and continues East where Brennerpass in the south (Silltal-Wipptal) repre- the trail meets the Goetheweg, one of the most sents a big west-dipping normal fault (Brenner spectacular panoramic trails around Innsbruck.
    [Show full text]
  • In and Around Innsbruck Is Vast Von Innsbruck Aufs Miemingertotal Plateau Length Und of Tour: Retour 80 Km Bike Point Radsport, Gumppstraße 20, Tel
    THE KARWENDEL TOUR: 3 TOUR FACTS EMERGENCY REPAIRS LOCAL TOUR ADVICE AROUND THE NATURE PARK Start and finish: Innsbruck Up the mountain, through the valley, along some lakes: the tour through Elevation gain: 550 m It only takes a few minutes by road bike to get out of the city. For a Is your bike broken? Don’t worry, these eleven specialists provide help: the Karwendel mountain range is a perfect example of variety of cycling Alpin Bike, Planötzenhofstraße 16, tel. +43 664 / 13 43 230 convenient and traffic-free escape, choose one of the many broad cycle Highest point: 869 m experiences in the Alps. The trip starts with a flat entry in Innsbruck and tracks. The choice of tours available in and around Innsbruck is vast Von Innsbruck aufs MiemingerTotal Plateau length und of tour: retour 80 km Bike Point Radsport, Gumppstraße 20, tel. +43 512 / 36 12 75 R O A D continues with a tough mountain climb from Telfs to Leutasch. From and diverse, offering unique views of the city, the countryside, and the Bikes and More, Herzog-Siegmund-Ufer 7, tel. +43 512 / 34 60 10 there, several climbs and descents along the Isar river will lead you Level of difficulty: beginner alpine scenery. It provides everyone, from hobby cyclists to professional BKD, Burgenlandstraße 29, tel. +43 512 / 34 32 26 through the Karwendel mountains to the Achensee Lake. Your return to Elevation profile: athletes, with an opportunity to take on challenges appropriate to their Innsbruck will take you through the Inntal Valley. 900 Die Börse, Leopoldstraße 4, tel.
    [Show full text]
  • Wildfires in the Northern Limestone Alps
    Geophysical Research Abstracts, Vol. 9, 07509, 2007 SRef-ID: 1607-7962/gra/EGU2007-A-07509 © European Geosciences Union 2007 Wildfires in the Northern Limestone Alps - the thin line between recovery and degradation K.-F. Wetzel (1), O. Sass (2), A. Friedmann (3) (1,2,3) Institute of Geography, University of Augsburg, Germany, [email protected] In the sub-alpine krummholz zone of the Northern Limestone Alps, numerous slopes can be observed which were severed by wildfires in the last centuries. Several histor- ical blazes burned the thick humus layers on the limestone bedrock which led to long lasting degradation. The affected areas are sharply separated from the surrounding slopes and are still noticeably bare of vegetation. An outweighing number of fires in the study area are due to anthropogenic influence like forestry, charcoal burning and arson for gaining pastures. Natural causes like strokes of lightning play a tangential role. Charcoal particles can be found almost everywhere in the soils of the study areas which shows that wildfire is an ubiquitous phenomenon in the northern Alps. The (by now) oldest black carbon samples were found on an apparently undisturbed slope and date back to 2,850 BP, which shows that full recovery is possible. However, under unfavourable conditions the time for the recovery of the ecosystems is estimated to be several centuries, if not centennials due to soil destruction and intensified geomorpho- logical processes. However, not all of the known historical wildfires had equally devastating effects. At the south-exposed side of the Inn valley, a mosaic of different stages of recovery and degradation is found today.
    [Show full text]
  • Tectonics of the Synorogenic "Kreideschiefer Basin", Northwestern Calcareous Alps, Austria
    Tectonics of the synorogenic "Kreideschiefer basin", northwestern Calcareous Alps, Austria Autor(en): May, Thomas / Eisbacher, Gerhard H. Objekttyp: Article Zeitschrift: Eclogae Geologicae Helvetiae Band (Jahr): 92 (1999) Heft 3 PDF erstellt am: 04.10.2021 Persistenter Link: http://doi.org/10.5169/seals-168673 Nutzungsbedingungen Die ETH-Bibliothek ist Anbieterin der digitalisierten Zeitschriften. Sie besitzt keine Urheberrechte an den Inhalten der Zeitschriften. Die Rechte liegen in der Regel bei den Herausgebern. Die auf der Plattform e-periodica veröffentlichten Dokumente stehen für nicht-kommerzielle Zwecke in Lehre und Forschung sowie für die private Nutzung frei zur Verfügung. Einzelne Dateien oder Ausdrucke aus diesem Angebot können zusammen mit diesen Nutzungsbedingungen und den korrekten Herkunftsbezeichnungen weitergegeben werden. Das Veröffentlichen von Bildern in Print- und Online-Publikationen ist nur mit vorheriger Genehmigung der Rechteinhaber erlaubt. Die systematische Speicherung von Teilen des elektronischen Angebots auf anderen Servern bedarf ebenfalls des schriftlichen Einverständnisses der Rechteinhaber. Haftungsausschluss Alle Angaben erfolgen ohne Gewähr für Vollständigkeit oder Richtigkeit. Es wird keine Haftung übernommen für Schäden durch die Verwendung von Informationen aus diesem Online-Angebot oder durch das Fehlen von Informationen. Dies gilt auch für Inhalte Dritter, die über dieses Angebot zugänglich sind. Ein Dienst der ETH-Bibliothek ETH Zürich, Rämistrasse 101, 8092 Zürich, Schweiz, www.library.ethz.ch
    [Show full text]
  • Phleum Commutatum and Ph. Rhaeticum (Poaceae) in the Eastern Alps: Characteristics and Distribution List of Seen Specimens
    Phleum commutatum and Ph. rhaeticum (Poaceae) in the Eastern Alps: Characteristics and Distribution List of Seen Specimens By Kurt ZERNIG Abteilung für Botanik, Landesmuseum Joanneum, Raubergasse 10, A-8010 Graz, e-mail: [email protected] Published May 9, 2005 For details see: Phyton (Horn, Austria) 45 (1): 65–79. Summary The two species of Phleum alpinum group – Ph. commutatum GAUDIN and Ph. rhaeticum (HUMPHRIES) RAUSCHERT – were investigated. They can be differentiated morphologically by the presence (Ph. rhaeticum) or absence (Ph. commutatum) of ciliae on the awns on the glumes. But this character turned out to be insufficient for populations which have one or few cilia on the base of awns. Some other morphological characters were tested, if and to what extent, they provide additional features to facilitate correct determination. The length of the anthers shows distinct differences between the two species: anthers of Ph. commutatum are (0.6) 0.7–1.2 (1.3) mm long, while those of Ph. rhaeticum measure (1.0) 1.3–2.0 (2.3) mm. Collection sites of more than 1200 revised herbarium specimens are localized and shown in dot maps. Ph. rhaeticum is very common and frequent in the central and southern regions of the Eastern Alps, towards the north it becomes rarer. It prefers pastures in the subalpine and alpine belt. Ph. commutatum, in contrast, grows especially in the alpine belt of the Central Alps, there forming part of the snow-bed vegetation. Towards the north it becomes more common, where it grows in moderate altitudes from 1500 m upwards.
    [Show full text]