EOCENE-PALEOCENE

Szentmihály Andesite Formation sE2-3
Products of a submarine and a terrestrial cycle of stratovolcanic activity, comprising lava, pyroclastite, sub-volcanic rock bodies
("Eocene magmatites in Zala Basin"). The volcanites (biotite-amphibole-andesite, amphibole-andesite, agglomerate, tuff, and tuffite)
are assigned to the Zalaszentmihály Andesite Member, whereas the intrusives (quartz-diorite, diorite-porphyrite) are classified as
the Pusztamogyoród Quartz-Diorite Member. The volcanics are deposited on the Szõc Limestone, intercalated with the Padrag Marl.
The volcanics are over 1000 m thick.
Transdanubian Range Zone (N Zala Basin)

ZELENKA, T.-BALÁZS, E.

Padrag Marl Formation pE2-3
Grey, greenish grey silty marl, with tuffaceous and bentonite strips, tuffite intercalations, sandstone sections ("Foraminifera marl",
"Csernye sandstone", "Mór siltstone formation", "Halimba tuffite formation"). The lower part is glauconitic calcareous marl
(Csabrendek Marl Member, formerly referred to as "Csabrendek marl formation"). The upper part includes some turbiditic sediments
at places. The sedimentary environment ranges from shallow pelagic to bathyal. Thickness: 100 to 300 m.
Transdanubian Range Zone (N Zala Basin and Bakony, Vértes, E Gerecse Mts)

KNAUER, J.-BERNHARDT, B.

Szépvölgy Limestone Formation sE3
Light grey limestone and calcareous marl of platform and sublittoral facies, with Nummulites, discocyclinids, Lithothamnium frequently
occurring in mass ("Upper Eocene limestone sequence", "Nagysáp formation"). Its thickness ranges from a few tens of metres to 250 m.
Transdanubian Range Zone (Vértes Mts, Buda Hills, Balatonfõ), North-Hungarian Range

BERNHARDT, B.

Nadap Andesite Formation nE2-3
Product of multiple cycles of stratovolcanic activity, comprising lava, pyroclastite, subvolcanic and metasomatite rock bodies.
The formation consists of volcanites (biotite-amphibole-andesite, biotite-agglomerate, tuff, tuffite, pyroxene-andesite, and dacite
which form the Sorompóvölgy Andesite Member), intrusives (diorite, diorite-porphyrite, the Cseplekhegy Diorite Member),
and altered rocks (quartzite with clay minerals, alunite, topaz and pyrites, the Pázmánd Metasomatite Member). Within the stratovolcanic
sequence there are sediment layers with Middle to Late Eocene fossils. The volcanics are over 1000 m thick, the subvolcanic body over 900 m.
Based on radiometric dating the age is 29 to 44 Ma.
Transdanubian Range Zone (Velence Hills)

ZELENKA, T.- DARIDA-TICHY, M.

Kosd Formation kE2-3
Limnic -upwards becoming brackish- variegated clay and grey clay, bauxitic clay, sand, sandstone gravel, dolomite and limestone clasts,
Locally with molluscan marl, limnic limestone and coal at its upper part. Thickness: 10 to 60 m.
Transdanubian Range Zone (Balatonfõ, East Side Blocks of the Danube, Environs of Budapest),
North-Hungarian Range (Bükk Mts)

BERNHARDT, B.

Recsk Andesite Formation rE3
Produced by a 5 cycles of stratovolcanic activity, it comprises lava, pyroclastite, subvolcanic, intrusive and metasomatic (skarn type)
rock bodies of different facies (submarine, terrestrial). Contains volcanites (amphybole-biotite andesite, agglomerate, tuff, tuffite,
amphibole-pyroxene-andesite, quartz-andesite), intrusives (diorite-porphyrite, quartz-diorite-porphyrite, igneous and pipe breccia),
and altered (endoskarn type, propylitic, phlogopitic, jarositic, kaoline-sericitic) rocks, and quartzite. It is both overlain and underlain
by the Szépvölgy Formation. Its members represent successive stages in the stratovolcanic and subvolcanic series. They are as follows,
from the bottom to the top: Fehérkõ Andesite-Diorite-Porphyrite Member, Veresvár Quartz-Andesite- Quartz-Diorite-Porphyrite Member,
Lahóca Andesite Member, Simahegy Quartz-Andesite-Quartz-Diorite Member and Nagykõ Andesite-Diorite Member. The volcanics have a
total thickness of 400 to 600 m, whereas the intrusion has a thickness of over 800 m. Based on radiometric dating, the age is 30 to 40 Ma.
North-Hungarian Range (Eastern Mátra Mt)

ZELENKA, T.-FÖLDESSY, J.

Szentlõrinc Formation slE3
A cyclic alternation of terrestrial, variegated clay, grey clay, silt, carbonaceous clay, coal, sandstone, gravel and conglomerate.
Thickness: 150 to 400 m.
Mecsek Mts (Szentlõrinc, Szigetvár)

BERNHARDT, B.

Szõc Limestone Formation sE2
Light grey, yellowish grey limestone, frequently with a large nodular texture, and often with large foraminifers in a rock-forming quantity
(Nummulites, Alveolina, Assilina, Discocyclina). Its sedimentary environment is shallow marine platform and sublittoral facies
("Main Nummulites limestone"). In the S Bakony, the lower part of the formation can be divided into four parts which are as follows,
from the bottom upwards: Miliolina and Alveolina limestone (Tüskésmajor Member), Assilina [Assilina aff. major] argillaceous limestone
(Nagytárkány Member), Alveolina limestone (Izamajor Member), Assilina [Assilina spira] limestone (Nyirád Member), overlain by perforatus
and millecaput limestone. In the NE part of the Transdanubian Range a threefold division applies: at the base there is biogenic detritus limestone
("Eocene limestone with a Mesozoic appearance", "Sûrûhegy limestone"), this is overlain by a limestone bed containing Nummulites perforatus in mass.
The top division is limestone and calcareous marl with Nummulites millecaput and Discocyclina. Thickness: 10 to 50 m (maximum 300 m).
Transdanubian Range Zone (N Zala Basin and Bakony, Vértes, Gerecse Mts)

BERNHARDT, B.-KNAUER, J.

Darvastó Formation dtE2
Contains grey clay marl, marl, at the base, locally variegated (bright red, or yellow)- clay, upwards coal ("Lower Lutetian coal sequence"),
molluscan and miliolina calcareous marl and limestone lenses (Cseteberek Clay Marl Member), sand, gravel, conglomerate
(Haraszti Conglomerate Member, formerly referred to as "Csabpuszta conglomerate member"), and locally dolomite detritus.
It is of shallow marine lagoon and off-shore bar origin. Thickness: 1 to 25 m.
Transdanubian Range Zone (N Zala Basin, SW Bakony Mts)

KNAUER, J.-BERNHARDT, B.

Csernye Formation csE2
Shallow-marine, grey marl, calcareous marl, silt, with fossils of gastropods, bivalves and corals appearing in mass and frequently
exhibiting a lumachelle-like enrichment ("coralline and molluscan marl"). Thickness: 10 to 20 m, and max. 50 m.
Transdanubian Range Zone (from N Bakony Mts to Dorog Basin)

BERNHARDT, B.

Dorog Formation dE2
Contains fluvial-lacustrine-paludal coal, carbonaceous clay, variegated clay, grey clay, bauxitic clay, sand, gravel, limnic limestone
and clay marl ("Late Lutetian coal seam sequence"). In the Nagyegyháza, Mány and Solymár Basins at the bottom of the sequence
there is a thick bed of dolomite detritus with bauxite lenses (Nagyegyháza Fanglomerate Member). In the paralic facies in the N Bakony
(which was formerly referred to as "Kisgyón formation") a typical sand sequence is found at the base (Rudolfháza Sand Member).
Maximum thickness: 300 metres.
Transdanubian Range Zone (NE Bakony Mts, NW part of Buda Hills)

BERNHARDT, B.

Csolnok Clay Marl Formation cE2
Grey clay marl and marl, with many large and medium sized foraminifers (Operculina, Nummulites, Discocyclina, Aktinocyclina,
Assilina exponens) frequently occurring in mass ("Operculina marl", "Nummulina marl"). It is deposited in shallow marine to deep neritic facies.
Thickness: 10 to 100 m.
Transdanubian Range Zone (from N Bakony Mts, to Buda Hills)

BERNHARDT, B.

Tokod Formation tE2
Alternation of shallow-marine, mollusc-, nummulite- and Miliolina-bearing clay marl and marl as well as limnic limestone and calcareous marl.
The lower part includes fluvial sand and calcareous sandstone ("Tokod sandstone"). Thickness: 10 to 60 m.
Transdanubian Range Zone (Tatabánya Basin, Buda Hills)

BERNHARDT, B.

Lencsehegy Formation lE2
Alternation of paludal or fluvial coal, carbonaceous clay, grey sand and sandstone beds ("Forna coal measures"). Thickness: 10 to 60 m.
Transdanubian Range Zone (Dorog, Mány Basins, NW part of Buda Hills)

BERNHARDT, B.

Kincses Formation kE2
Alternation of shallow marine, grey, light grey calcareous marl, limestone, marl, comprising a large amount of molluscs, Miliolina and
Nummulites which are frequently appearing in mass. Thickness: 10 to 100 m.
Transdanubian Range Zone (Kincsesbánya)

BERNHARDT, B.

Forna Formation fE2
Alternation of grey clay, marl, molluscan and miliolina marl with thin coal and carbonaceous clay beds ("Forna beds"). It is a brackish,
paludal formation that is becoming shallow marine upwards, with bauxitic clay, variegated clay at the base. Thickness: 20 to 100 m.
Transdanubian Range Zone (SE Vértes Mts)

BERNHARDT, B.

Gánt Bauxite Formation gE1
Bauxite, bauxitic clay, kaoline clay, bauxite with extraclast and intraclast lenses. A bauxite sequence with Eocene overburden.
Most likely age: (Paleocene to) Early Eocene
Transdanubian Range Zone (Bakony, Vértes, Gerecse Mts and East Side Blocks of the Danube)

BERNHARDT, B.