Coastal sandy spit deposits (Lower Burdigalian/Eggenburgian)  in the Alpine-Carpathian Foredeep of Lower Austria

Nehyba, Slavomír; Roetzel, Reinhard

doi:10.7306/gq.1619

Cited by 5 publications

(16 citation statements)

References 63 publications

(135 reference statements)

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“…The Burgschleinitz For ma tion in the Obermarkersdorf Basin has a thick ness of at least 20 metres. In con trast to the Burgschleinitz For ma tion in the Eggenburg Bay (Nehyba and Roetzel, 2021), the de pos its are here very poor in fos sils. Bivalves, fish teeth and ribs of sea-cows are found only rarely (Roetzel and Hein rich, 1999).…”

Section: Geological Settingmentioning

confidence: 73%

“…For com par i son, the ZTR in dex of the de pos its from the Obermarkersdorf and Rosenau area are sig nif i cantly lower than that of the de pos its of the Burgschleinitz For ma tion from the expo sures around Maigen in the Eggenburg Bay (Nehyba and Roetzel, 2021). How ever, the ATi and Gzi indices are higher at Obermarkersdorf and Rosenau.…”

Section: Interpretation Of Provenance Datamentioning

confidence: 83%

“…9B; Girty et al, 2003). Compared to the sam ples from the Maigen area in the Eggenburg Bay (Nehyba and Roetzel, 2021), the plagioclase con tent of the sam ples from the Obermarkersdorf area is sig nif i cantly higher. To gether with the higher quartz/feld spar ra tio this in di cates the im por tant role a first-cy cle source in the sam ples from the Diem sand pit, while a greater role of re cy cling and weath er ing is ev i dent in the sam ples from the Maigen area (Nehyba and Roetzel, 2021).…”

Section: Petrography Of Light Mineralsmentioning

confidence: 90%

“…Prov e nance data in com bi na tion with palaeocurrrent pat terns can con strain the role of on shore-off shore and alongshore trans port. For that rea son, some prov e nance data are com pared with sim i lar data from the nearby (~14 km SW) lo cality of Maigen, which is sit u ated SW of the study area in the shallow ma rine Eggenburg Bay (Nehyba and Roetzel, 2021).…”

Section: Grain Size and Provenance Analysismentioning

confidence: 99%

“…Such a dis tri bu tion re flects the dif fer ent sources of the most cratonward part of the dis tal Al pine-Carpathian Foredeep Ba sin, where the ma te rial from crys tal line meta mor phic rocks is mixed with that from granitoids. Al though the sam ples from the Obermarkersdorf and Maigen area (Nehyba and Roetzel, 2021) re veal a gen er ally com mon or i gin, some dif fer ences in prov e nance are ev i dent. The sands from the Maigen lo cal ity range from sublithic to lithic arenites, in di cat ing a higher pro portion of supracrustal rocks (sed i men tary+meta mor phic rocks).…”

Section: Petrography Of Light Mineralsmentioning

confidence: 99%

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High-energy, microtidal nearshore deposits and their provenance (Lower Miocene, Burdigalian/Eggenburgian, Alpine-Carpathian Foredeep, Lower Austria)

Nehyba

Roetzel

2022

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Dur ing the Early Mio cene (Early Burdigalian/Eggenburgian) ma rine trans gres sion at the south east ern mar gin of the Bo hemian Mas sif, grad ual flood ing oc curred along a rocky coast on gra nitic bed rock of the Thaya Batholith un der high-en ergy, wave-dom i nated, microtidal and mixed fair-weather and storm con di tions. De pos its of the Burgschleinitz For ma tion over lie a basal un con formity above a subaerial weath ered base ment sur face (transgressive ero sional sur face) and are in ter preted as a transgressive sys tems tract. The de pos its can be di vided into four fa cies as so ci a tions/depositional en vi ron ments, i.e., upper-shoreface, fore shore, grav elly beach and backshore/la goon. Two stages of trans gres sion and suc ces sive over top ping of the base ment, with dif fer ent coastal physiographies, were doc u mented. Dur ing the ini tial stage of trans gres sion a bar rier island sys tem de vel oped with rel a tively fine-grained de pos its, re flect ing the flood ing of the dis tant parts of the Thaya Batholith with a rel a tive flat base ment mor phol ogy. The sub se quent con tin u a tion of the trans gres sion led to the flood ing of the more prox i mal parts of the Thaya Batholith with a steeper re lief and for ma tion of a rocky shore line with de po si tion of grav elly sed iments along palaeo-sea cliffs or wave-cut plat forms. While gravel clasts of the de pos its in ves ti gated orig i nate di rectly from the un der ly ing gran ites of the Thaya Batholith, prov e nance stud ies show that meta mor phic rocks of the Moravian Superunit in the hin ter land were the main source of sands. This dis tant source ma te rial was prob a bly de liv ered mainly by small creeks and al lu vial fans to the nearshore. Sig nif i cant dif fer ences in heavy min eral com po si tion of the same for ma tion in the wider vicin ity in di cate pri mar ily lo cal sources and rapid de po si tion with sub or di nate long shore trans port, which may re flect a com plex coastal palaeo ge ogra phy. The Lower Mio cene de pos its of the Burgschleinitz For ma tion in ves ti gated are a rare ex am ple of an cient rocky shore de pos its, which gen er ally have low pres er va tion po ten tial in the geo log i cal re cord.

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Section: Geological Settingmentioning

confidence: 73%

Section: Interpretation Of Provenance Datamentioning

confidence: 83%

Section: Petrography Of Light Mineralsmentioning

confidence: 90%

Section: Grain Size and Provenance Analysismentioning

confidence: 99%

Section: Petrography Of Light Mineralsmentioning

confidence: 99%

See 3 more Smart Citations

High-energy, microtidal nearshore deposits and their provenance (Lower Miocene, Burdigalian/Eggenburgian, Alpine-Carpathian Foredeep, Lower Austria)

Nehyba

Roetzel

2022

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Transgressive rocky coasts in the geological record: Insights from Miocene granitic rocky shorelines and modern examples

López

Howell

Roetzel

et al. 2023

Sedimentary Geology

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Facies models for rocky shorelines and their application to transgressed basement highs in the North Sea

Puig López,

Howell

2024

JGS

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Rocky shorelines form where basement highs are eroded and flooded during marine transgressive events. Despite the Mesozoic North Sea rift generated numerous platform margins and rotated fault blocks which acted as basement highs, rocky shoreline deposits have not been previously reported. In the rock record rocky shoreline deposits are usually represented by thin conglomerates overlying major unconformities, and are typically characterised by their ichnological aspects, rather than their depositional facies. This study uses the sedimentological aspects of modern and Miocene rocky shorelines from Spain and Austria, to create facies models which are then applied to the recognition of rocky shorelines in the Mesozoic of the Central North Sea. Our results demonstrate that structureless, clast-supported, poorly-to-moderately sorted conglomerate-breccia deposits are associated with competent basement lithologies, which produce hard, resistant coastal cliffs around previously overlooked volcanic centres in the subsurface of the North Sea. The basement lithologies in most of the Central North Sea favoured the formation of softer coastal cliffs, with less resistant lithologies that did not generate or preserve gravel size particles, being mostly characterised by low-angle, unconformity-bounded sandstone and fine-grained deposits and precluding the preservation and recognition of Mesozoic rocky shores in much of the North Sea's stratigraphic record.

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Coastal sandy spit deposits (Lower Burdigalian/Eggenburgian) in the Alpine-Carpathian Foredeep of Lower Austria

Cited by 5 publications

References 63 publications

High-energy, microtidal nearshore deposits and their provenance (Lower Miocene, Burdigalian/Eggenburgian, Alpine-Carpathian Foredeep, Lower Austria)

High-energy, microtidal nearshore deposits and their provenance (Lower Miocene, Burdigalian/Eggenburgian, Alpine-Carpathian Foredeep, Lower Austria)

Transgressive rocky coasts in the geological record: Insights from Miocene granitic rocky shorelines and modern examples

Facies models for rocky shorelines and their application to transgressed basement highs in the North Sea

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