Pannonian Sea in the context of "Carpathian basin"

The Pannonian Basin, with the term Carpathian Basin being sometimes preferred in Hungarian literature, is a large, mainly lowland area in southeastern Central Europe, briefly described as a sedimentary basin. Under the geopolitically changed conditions created by World War I and the ensuing Treaty of Trianon, the geomorphological term Pannonian Plain was also used for roughly the same region, referring to the lowlands in the area occupied by the Pannonian Sea during the Pliocene. However, Hungarian geographers consider the term "Pannonian Plain" not only unhistorical but also topographically highly erroneous. Regarding the name as such, they are arguing in terms of ancient history, namely that the northern and eastern boundary line of the namesake Roman province of Pannonia was formed by the River Danube, thus the Great Hungarian Plain was not part of the original Pannonia province.

Medvednica (pronounced [mědʋednitsa], lit. 'Bear mountain') is a mountain in central Croatia, just north of Zagreb, and marking the southern border of the historic region of Zagorje. Most of it is encompassed by the Medvednica Nature Park. The highest peak, at 1,035 m (3,396 ft) is Sljeme. Most of the area of Medvednica is a nature park (park prirode), a type of preservation lesser than a national park. During the Miocene and the Pliocene, the mountain was an island within the Pannonian Sea. Together with the surrounding hills, it is known as Zagrebačka gora or the "Zagreb Mountains", as well as Bistranjska gora, Markuševačka gora, Stubička gora and Vrabečka gora.