Speleogenesis and Landscape Evolution in Karst Systems

Karst terrains arise where soluble rocks, most commonly limestone and dolomite, are sculpted by natural waters into distinctive subsurface and surface landforms. Speleogenesis—the formation and enlargement of cave conduits—proceeds through a series of hydrological phases, including phreatic dissolution under the water table and vadose trenching where water percolates downward. Hypogene processes, driven by ascending fluids often charged with deep‐seated acids or heat, may produce maze‐like networks, whereas epigene processes, fed from surface recharge, yield dendritic passages. Over geological time, the interplay of uplift, climate oscillations and fluvial incision governs the exposure, abandonment and re-use of cave levels, leaving a stepped record of landscape evolution. Speleothems and sediment fills within these voids serve as archives of palaeohydrology, tectonics and climate, offering insight into regional uplift rates, valley history and resource sustainability in karst aquifers worldwide.

Research from Nature Portfolio

Recent studies have demonstrated that speleothem archives extend far beyond the conventional mid-Pleistocene record. Using U-Pb chronometry, fragile formations in a vast, shallow cave system beneath the Nullarbor Plain were dated to the Pliocene, revealing cave networks largely established by c. 4.2 Ma. This finding confirms that large-scale karst systems—and their speleothem records—can survive over multi-million-year intervals, thereby offering unbroken archives of ancient climates and landscape stability. Such deep-time chronologies challenge previous assumptions about the longevity of subterranean carbonate archives and open new avenues for reconstructing Earth’s surface evolution over tens of millions of years.

Speleogenesis and Landscape Evolution in Karst Systems publication trend

The graph below shows the total number of articles in speleogenesis and landscape evolution in karst systems across all publications each year (not limited to Nature Index journals).

Technical terms

Speleogenesis: The suite of chemical and physical processes by which caves and conduits are dissolved, enlarged and evolve within soluble rock.

Hypogene speleogenesis: Cave development driven by ascending waters derived from deep-seated sources, often bearing acids or heat, producing solutional features independent of surface recharge.

Epigene speleogenesis: Karstification initiated by surface-derived waters infiltrating into the subsurface, typically under gravitational flow.

Phreatic zone: The saturated region below the water table where dissolution can occur uniformly in all directions, often yielding tubular conduits.

Vadose zone: The unsaturated region above the water table where percolating water forms vertical shafts and entrenched channels.

Speleothem: Secondary mineral deposits such as stalactites and stalagmites formed by precipitation of minerals from dripping or flowing water within caves.

Paragenesis: The process by which sediment infill and mineral precipitation within a cave modify pre-existing passage geometries, often filling low areas and shaping ceilings from below.

References

1. The antiquity of Nullarbor speleothems and implications for karst palaeoclimate archives. Scientific Reports (2019).
2. Stable isotope imprint of hypogene speleogenesis: Lessons from Austrian caves. Chemical Geology (2021).
3. Hypogene speleogenesis and paragenesis in the Dolomites. Geomorphology (2021).
4. Changes in Cave Sedimentation Mechanisms During the Late Quaternary: An Example From the Lower Cerovačka Cave, Croatia. Frontiers in Earth Science (2021).