The
Budaörs dolomite of
Anisian-Carnian age (
Triassic period) is the oldest formation which crops out in the Buda Hills. Younger Triassic succession is composed of
cherty
dolomite and
limestone (basin
facies), and dolomite combined with limestone (platform facies). The Triassic surface is composed of
karstified
carbonates, which are overlain by an
Upper Eocene succession made of
conglomerate beds. During the period from the terminal
Cretaceous to
Priabonian, the area was a karstic terrestrial environment displaying distinct relief differences. It was also the time when Triassic formations were eroded. The continental period (ended by the
transgression in
Late Eocene) was characterized by the formation of small
fans at the slope foot. The fans contained substantial quantities of
andesite clasts thanks to the fans' close location to the andesite source rocks. The clasts could have been then transported by periodic streams along the valleys. The Late Eocene transgression reworked accumulated terrestrial sediments. ==Important hills==