23/04/2026
A team of international researchers, led by our colleagues from the “Emil Racoviță” Institute of Speleology and University of Bucharest have recently published an interesting study in the prestigious journal Sedimentary Geology, opening a window into the turbulent climatic past of the Carpathian region. By investigating the depths of two of Romania's most famous caves, Muierilor Cave (Parâng Mountains) and Urșilor Cave (Bihor Mountains), scientists have successfully decoded the "history written in mud and gravel" regarding extreme climatic events that occurred tens of thousands of years ago.
Why are caves so important for climatologists? Unlike the Earth's surface, where erosion, wind, and rain erase the traces of the past, caves act as protected natural storehouses. The sediments deposited here, what geologists sometimes call "missing stratigraphy", preserve intact evidence of what the climate was like and which animals roamed the area, evidence that has long since vanished from the surface.
The study focused on a period known as MIS 3-2 (roughly between 57,000 and 11,700 years ago), an era marked by violent climatic oscillations and abrupt shifts from extreme cold to rapid warming.
Researchers identified three major hydrological events that occurred simultaneously in both caves, despite them being located in different mountain ranges. These took place approximately 46,000, 34,500, and 29,000 years ago.
Analysis of gravel shapes and grain sizes proved that the caves were hit by high-magnitude "flash floods." These surges were powerful enough to sweep away and redeposit chaotic mixtures of prehistoric animal remains, including the cave bear, cave lion, and wolf.
These floods were not random; they were triggered by large-scale climatic variations, likely fueled by heavy rainfall or the rapid melting of snow and small glaciers that once existed on the Carpathian peaks.
Understanding how our region reacted to abrupt climate changes in the past is essential for anticipating extreme phenomena in the future. The study demonstrates that Romania's caves are not just spectacular tourist attractions, but invaluable scientific archives that help us assemble the complex puzzle of Earth's history.
