Üledékföldtaniés szerkezetföldtani megfigyelések a gorba-hát keleti lejto{double acute}jén ("Gyökér-völgy", Nyugati-Gerecse)

Translated title of the contribution: Sedimentological and structural geologic observations at the eastern slope of the gorba high ("Gyökér Ravine", Western Gerecse Mts, Hungary)

Horányi Anna, Takács Ágnes, L. Fodor

Research output: Contribution to journalArticle

Abstract

The deposition of the Jurassic - Lower Cretaceous sequence in the Gerecse Mts was defined by differentiated palaeotopography likewise in other parts of the Transdanubian Range (GALA ́CZ & VÖRÖS 1972, GALA ́CZ 1988, VÖRÖS & GALA ́CZ 1998). The most characteristic element of the palaeomorphology was the uplifted Gorba High (CSA ́SZA ́R 1995) where condensed, discontinuous sedimentation occurred. The studied section is situated in a small valley called Gyökér Ravine in the eastern flank of the Alsó-Látó Hill (Figure 1) where multiple recurrence of an approximately 5 m thickJurassic-Berrriasian condensed succession can be observed (Figure 3). The lowermost Jurassic beds are crinoid-bearinglimestones containing thin calcareous turbidite layers of Liassic age overlain by Saccocoma- and Calpionella-bearing Upper Jurassic - Berriasian limestones and Lower Cretaceous sandstones (Figure 6). The Middle Jurassic is missing, apart from a local appearance of condensed variety of the Tölgyhát Limestone Formation (Bositra limestone) which related to the coeval sediments of the Asszony and Szél Hills. The sedimentary sequence suggests deposition in the upper part of the palaeoslope of the Gorba High. This marginal position of the profile is also indicated by the presence of Hierlatz Limestone and a Liassic fault or dyke margin at the western end of the southern part of the Gyökér Ravine. In contrast with the former olistolithic models (LANTOS 1997, FODOR & LANTOS 1998, BA ́RA ́NY 2004) low angle, west tonorth-west dipping normal faults can explain the repeated occurrence of the Mesozoic series. The tectonic reconstruction (backtilting) suggests that the normal faults formed due to ESE-WNW extension, before the tilt of the sequence, which was induced by NE-SW compression. The normal faults supposed to be Aptian to early Albian, while the tilt itself could beAlbian.

Original languageHungarian
Pages (from-to)223-234
Number of pages12
JournalFoldtani Kozlony
Volume140
Issue number3
Publication statusPublished - 2010

Fingerprint

Calcium Carbonate
Jurassic
limestone
normal fault
tilt
Bearings (structural)
Cretaceous
paleotopography
tectonic reconstruction
Berriasian
Aptian
Tectonics
turbidite
Sandstone
sedimentary sequence
Sedimentation
dike
Sediments
compression
sandstone

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology
  • Palaeontology
  • Stratigraphy

Cite this

Üledékföldtaniés szerkezetföldtani megfigyelések a gorba-hát keleti lejto{double acute}jén ("Gyökér-völgy", Nyugati-Gerecse). / Anna, Horányi; Ágnes, Takács; Fodor, L.

In: Foldtani Kozlony, Vol. 140, No. 3, 2010, p. 223-234.

Research output: Contribution to journalArticle

@article{ad114bc86b064c608bd6ba7de31a2bc1,
title = "{\"U}led{\'e}kf{\"o}ldtani{\'e}s szerkezetf{\"o}ldtani megfigyel{\'e}sek a gorba-h{\'a}t keleti lejto{double acute}j{\'e}n ({"}Gy{\"o}k{\'e}r-v{\"o}lgy{"}, Nyugati-Gerecse)",
abstract = "The deposition of the Jurassic - Lower Cretaceous sequence in the Gerecse Mts was defined by differentiated palaeotopography likewise in other parts of the Transdanubian Range (GALA ́CZ & V{\"O}R{\"O}S 1972, GALA ́CZ 1988, V{\"O}R{\"O}S & GALA ́CZ 1998). The most characteristic element of the palaeomorphology was the uplifted Gorba High (CSA ́SZA ́R 1995) where condensed, discontinuous sedimentation occurred. The studied section is situated in a small valley called Gy{\"o}k{\'e}r Ravine in the eastern flank of the Als{\'o}-L{\'a}t{\'o} Hill (Figure 1) where multiple recurrence of an approximately 5 m thickJurassic-Berrriasian condensed succession can be observed (Figure 3). The lowermost Jurassic beds are crinoid-bearinglimestones containing thin calcareous turbidite layers of Liassic age overlain by Saccocoma- and Calpionella-bearing Upper Jurassic - Berriasian limestones and Lower Cretaceous sandstones (Figure 6). The Middle Jurassic is missing, apart from a local appearance of condensed variety of the T{\"o}lgyh{\'a}t Limestone Formation (Bositra limestone) which related to the coeval sediments of the Asszony and Sz{\'e}l Hills. The sedimentary sequence suggests deposition in the upper part of the palaeoslope of the Gorba High. This marginal position of the profile is also indicated by the presence of Hierlatz Limestone and a Liassic fault or dyke margin at the western end of the southern part of the Gy{\"o}k{\'e}r Ravine. In contrast with the former olistolithic models (LANTOS 1997, FODOR & LANTOS 1998, BA ́RA ́NY 2004) low angle, west tonorth-west dipping normal faults can explain the repeated occurrence of the Mesozoic series. The tectonic reconstruction (backtilting) suggests that the normal faults formed due to ESE-WNW extension, before the tilt of the sequence, which was induced by NE-SW compression. The normal faults supposed to be Aptian to early Albian, while the tilt itself could beAlbian.",
keywords = "Condensed sedimentary succession, Early cretaceous, Gerecse mts, Gorba high, Hungary, Jurassic, Tectonic evolution",
author = "Hor{\'a}nyi Anna and Tak{\'a}cs {\'A}gnes and L. Fodor",
year = "2010",
language = "Hungarian",
volume = "140",
pages = "223--234",
journal = "Foldtani Kozlony",
issn = "0015-542X",
publisher = "Hungarian Geological Society",
number = "3",

}

TY - JOUR

T1 - Üledékföldtaniés szerkezetföldtani megfigyelések a gorba-hát keleti lejto{double acute}jén ("Gyökér-völgy", Nyugati-Gerecse)

AU - Anna, Horányi

AU - Ágnes, Takács

AU - Fodor, L.

PY - 2010

Y1 - 2010

N2 - The deposition of the Jurassic - Lower Cretaceous sequence in the Gerecse Mts was defined by differentiated palaeotopography likewise in other parts of the Transdanubian Range (GALA ́CZ & VÖRÖS 1972, GALA ́CZ 1988, VÖRÖS & GALA ́CZ 1998). The most characteristic element of the palaeomorphology was the uplifted Gorba High (CSA ́SZA ́R 1995) where condensed, discontinuous sedimentation occurred. The studied section is situated in a small valley called Gyökér Ravine in the eastern flank of the Alsó-Látó Hill (Figure 1) where multiple recurrence of an approximately 5 m thickJurassic-Berrriasian condensed succession can be observed (Figure 3). The lowermost Jurassic beds are crinoid-bearinglimestones containing thin calcareous turbidite layers of Liassic age overlain by Saccocoma- and Calpionella-bearing Upper Jurassic - Berriasian limestones and Lower Cretaceous sandstones (Figure 6). The Middle Jurassic is missing, apart from a local appearance of condensed variety of the Tölgyhát Limestone Formation (Bositra limestone) which related to the coeval sediments of the Asszony and Szél Hills. The sedimentary sequence suggests deposition in the upper part of the palaeoslope of the Gorba High. This marginal position of the profile is also indicated by the presence of Hierlatz Limestone and a Liassic fault or dyke margin at the western end of the southern part of the Gyökér Ravine. In contrast with the former olistolithic models (LANTOS 1997, FODOR & LANTOS 1998, BA ́RA ́NY 2004) low angle, west tonorth-west dipping normal faults can explain the repeated occurrence of the Mesozoic series. The tectonic reconstruction (backtilting) suggests that the normal faults formed due to ESE-WNW extension, before the tilt of the sequence, which was induced by NE-SW compression. The normal faults supposed to be Aptian to early Albian, while the tilt itself could beAlbian.

AB - The deposition of the Jurassic - Lower Cretaceous sequence in the Gerecse Mts was defined by differentiated palaeotopography likewise in other parts of the Transdanubian Range (GALA ́CZ & VÖRÖS 1972, GALA ́CZ 1988, VÖRÖS & GALA ́CZ 1998). The most characteristic element of the palaeomorphology was the uplifted Gorba High (CSA ́SZA ́R 1995) where condensed, discontinuous sedimentation occurred. The studied section is situated in a small valley called Gyökér Ravine in the eastern flank of the Alsó-Látó Hill (Figure 1) where multiple recurrence of an approximately 5 m thickJurassic-Berrriasian condensed succession can be observed (Figure 3). The lowermost Jurassic beds are crinoid-bearinglimestones containing thin calcareous turbidite layers of Liassic age overlain by Saccocoma- and Calpionella-bearing Upper Jurassic - Berriasian limestones and Lower Cretaceous sandstones (Figure 6). The Middle Jurassic is missing, apart from a local appearance of condensed variety of the Tölgyhát Limestone Formation (Bositra limestone) which related to the coeval sediments of the Asszony and Szél Hills. The sedimentary sequence suggests deposition in the upper part of the palaeoslope of the Gorba High. This marginal position of the profile is also indicated by the presence of Hierlatz Limestone and a Liassic fault or dyke margin at the western end of the southern part of the Gyökér Ravine. In contrast with the former olistolithic models (LANTOS 1997, FODOR & LANTOS 1998, BA ́RA ́NY 2004) low angle, west tonorth-west dipping normal faults can explain the repeated occurrence of the Mesozoic series. The tectonic reconstruction (backtilting) suggests that the normal faults formed due to ESE-WNW extension, before the tilt of the sequence, which was induced by NE-SW compression. The normal faults supposed to be Aptian to early Albian, while the tilt itself could beAlbian.

KW - Condensed sedimentary succession

KW - Early cretaceous

KW - Gerecse mts

KW - Gorba high

KW - Hungary

KW - Jurassic

KW - Tectonic evolution

UR - http://www.scopus.com/inward/record.url?scp=78149310788&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78149310788&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:78149310788

VL - 140

SP - 223

EP - 234

JO - Foldtani Kozlony

JF - Foldtani Kozlony

SN - 0015-542X

IS - 3

ER -