Romania · Evidence from 70 million years

The Carpathians: vanished seas, ice and mountain citadels

In Romania, Turda’s salt, the human from Oase and Dacian fortresses preserve histories of very different ages. Follow the evidence on real relief and draw a section across the mountains.

Open the map Read the landscape

18documented places. A section through the relief shows which evidence lies close together.

Today’s relief. Evidence from different periods.

Age of the evidence, present location

The evidence map

Choose a period, then a point. Colours separate the ages of the evidence; the relief and rivers remain those of today.

Today’s relief. Evidence from different periods.

The evidence hereToday’s relief. Evidence from different periods.

The dinosaur islandSea and saltPeople and glaciersFortresses and minesThe mountains today

Ma = million years; ka = thousand years.

Real relief · calculated distances

Cut across the relief in any direction

Choose two towns or two points on the map. The profile follows the straight line between them; the list shows featured places within 30 km of that line.

From

184 kmSection length

2,168 mHighest sampled elevation

3Places within 30 km

Bihor — Făgăraș0 kmSampled elevation

Approximate elevations from ETOPO 2022, sampled at roughly 1 km. Narrow peaks are smoothed. The profile shows today’s surface, without inferred geological strata.

Evidence near the section

Făgăraș Mountains Căpâlna Roșia Montană

Hațeg was not an island in a sea from 14 million years ago

Dinosaurs lived here before the salt and fortresses. Tens of millions of years separate these worlds.

Fossils from Hațeg, a basin in southwestern Transylvania, belong to the Late Cretaceous, when Europe contained many islands. Csiki-Sava and colleagues’ 2015 synthesis places the regional fauna in that archipelago. Some dinosaur lineages evolved small bodies; several kinds of evidence support insularity, rather than the shape of today’s basin.

Today’s Carpathians cannot supply the outline of that ancient island. A fossil found at low elevation does not tell us how high the animal lived, and a present summit was not automatically dry land in the Cretaceous. The map point answers a different question: where is the evidence now?

Csiki-Sava et al. (2015), Island life in the Cretaceous

Hațeg’s dinosaurs compared at true scale ↗

Why is there salt beside the mountains?

At Turda and Slănic, a soluble rock preserves the history of salt-water basins.

During the Miocene, connections between the Central Paratethys and the ocean changed, along with its salinity. Evaporite deposits, including salt, record part of this history. Báldi and colleagues’ 2017 paper discusses the Badenian Salinity Crisis around 13.8 million years ago and lists salt deposits in the Transylvanian Basin.

Salt deposited then was subsequently buried and deformed. A mine gallery is a human excavation through a much older rock. Neither the entrance elevation nor the mine ceiling represents Miocene sea level. Reconstructing that shore requires separate palaeogeographic evidence, explored in the dedicated Paratethys project.

Grey salt walls and ceiling with folded bands — Praid mine walls expose Miocene salt deformed later. Photograph: Octav Druta, Wikimedia Commons, CC BY-SA 3.0. Commons · CC BY-SA 3.0

Báldi et al. (2017), Discovery of the Badenian evaporites inside the Carpathian Arc

Paratethys on published reconstructions ↗

The human from Oase lived before Retezat’s glaciers retreated

A jawbone and a moraine boulder measure different things.

The 2015 genomic analysis of Oase 1, a human jawbone from a cave in southwestern Romania, estimated 6–9% Neanderthal ancestry. The length of the DNA segments indicated a Neanderthal ancestor four to six generations earlier. This is a conclusion about one individual, rather than an observed meeting in a particular valley or a statement about every regional population.

In Pietrele Valley in the Retezat Mountains, beryllium-10 dating of moraine boulders tracked exposure after ice retreat. The 2007 study places retreat from the studied maximum position at around 17,000–16,000 years ago. Putting these places together reveals how much time the phrase “the Ice Age” compresses. It does not establish occupation of the cave at the last glacial maximum.

Fu et al. (2015), An early modern human from Romania with a recent Neanderthal ancestor · Reuther et al. (2007), Late Pleistocene glacial chronology of the Pietrele Valley · Urdea et al. (2022), The Romanian Carpathians: glacial landforms prior to the Last Glacial Maximum

What the Oase human’s DNA reveals ↗

Fortresses and gold have histories that meet, but do not coincide

Sarmizegetusa Regia was Dacian. Much of the mining evidence at Roșia Montană concerns the Roman world.

The UNESCO group contains six fortresses: Sarmizegetusa Regia, Costești-Cetățuie, Costești-Blidaru, Luncani-Piatra Roșie, Bănița and Căpâlna. They are distinct places with their own positions and structures. Showing them on present relief allows comparison, but a line drawn between them does not reconstruct a Dacian road.

At Roșia Montană in the Apuseni Mountains, UNESCO describes a Roman gold-mining complex developed during the second and third centuries CE. Galleries and surviving documents support a specific history of mining. They do not automatically establish continuous exploitation since prehistory or a single explanation for the conquest of Dacia. At Sarmizegetusa, the function of an object called a “sun” likewise requires separate evidence.

Sarmizegetusa Regia sanctuaries in a clearing surrounded by forest — Sarmizegetusa Regia’s sanctuary area in today’s landscape. Photograph: Miehs, Wikimedia Commons, CC BY-SA 3.0 ro; resized. Commons · CC BY-SA 3.0 ro

Muzeul Național de Istorie a Transilvaniei — Cetățile dacice · UNESCO — Roșia Montană Mining Landscape

The sanctuaries and the calendar hypothesis ↗

What continues beneath the forests and the crust?

A crater, a mud cone and an earthquake source are different phenomena.

Ciomadul, in Romania’s Eastern Carpathians, is a volcano whose last eruptions are dated to around 30,000 years ago. At Berca, gas from a hydrocarbon reservoir drives water and clay upward, building the small mud cones described by UNESCO. Similar shapes do not imply the same process or the presence of lava.

Beneath Vrancea, Romania’s earth-physics institute documents earthquakes at intermediate depths, about 60–200 km. In the Cerna Valley, UNESCO-listed beech forests provide evidence about ecosystems and conservation. Their status does not establish the entire Carpathian arc as “Europe’s last untouched forest”. Each place preserves part of the story; the map brings them together without assigning them the same age.

Karátson et al. (2016), The latest explosive eruptions of Ciomadul · UNESCO — Buzău Land Global Geopark · INCDFP — Source parameters of Vrancea subcrustal earthquakes · UNESCO/IUCN — Domogled–Valea Cernei component cluster, fig. 11

Why earthquakes occur beneath Vrancea ↗

Evidence, place by place

The 18 places

An editorial selection, not a complete inventory. Each record states what the place establishes and what cannot be inferred. Locations are rounded; these are not access directions.

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18 / 18

The dinosaur island

Hațeg Basin

Late Cretaceous fossils

Continental sediments preserve dinosaurs from an island world about 70 million years ago. The marker represents the basin, across which finds are scattered.

The Carpathians: vanished seas, ice and mountain citadels

The evidence map

Cut across the relief in any direction

Evidence near the section

Hațeg was not an island in a sea from 14 million years ago

Why is there salt beside the mountains?

The human from Oase lived before Retezat’s glaciers retreated

Fortresses and gold have histories that meet, but do not coincide

What continues beneath the forests and the crust?

The 18 places

Hațeg Basin

Turda salt mine

Slănic Prahova

Peștera cu Oase

Pietrele Valley, Retezat

Făgăraș Mountains

Rodna Mountains

Sarmizegetusa Regia

Costești-Cetățuie

Costești-Blidaru

Luncani-Piatra Roșie

Bănița

Căpâlna

Roșia Montană

Ciomadul and Lake Sfânta Ana

Berca mud volcanoes

Domogled–Valea Cernei

Vrancea seismic zone

Sources and limits