This paper presents continuous high-resolution stable isotope records of environmental change in New Zealand from speleothems that grew over the last 31,000 yr. Oxygen isotope variation in these speleothems primarily represents changes
in the meteoric waters falling above the caves, possibly responding to latitudinal changes in the position of the Subtropical Front in the Tasman sea. Carbone isotope variations in the speleothems record changes in forest productivity, closely matching existing
Study of siliceous karst genesis in eastern Niger : microscopy and X-ray microanalysis of speleothems
région. Les spéléothèmes montrent au moins 2 phases marquant l'assèchement d'un aquifère, en relation avec le façonnement actuel du paysage. Une mobilisation significative du Si et du Fe confirme la nature silico-ferreuse du karst dans cette partie du
Palaeoenvironmental evidence for synchronous changes in calcite flowstones formation, speleothems erosion, and/or dissolution and equatorial wetter conditions in the tropical karst of Mount Hoyo (N. E. Zaire)
, within a dry, abandoned river passage decoupled from the active stream galleries. As the Aranzadi Gallery is situated far downstream in the network beneath a forest cover, speleothems could be deposited in it during temperate periods. During cold periods
sedimentation was directly controlled by glaciers and speleothem deposition was very limited or impossible.