Dynamic equilibrium among erosion, river incision, and coastal uplift in the northern and central Apennines, Italy

Cyr, Andrew J.; Granger, Darryl E.

doi:10.1130/g24003a.1

Cited by 109 publications

(85 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(MIS 3). Since that time, the fluvial system in the L'Aquila-Scoppito subbasin has incised at a rate between 0.24 and 0.32 mm/yr, which is consistent with the middle to late Pleistocene incision rates estimated from cosmogenic nuclide data for the central-northern Apennines by Cyr and Granger (2008). In contrast, higher incision rates were estimated by Wegmann and Pazzaglia (2009) for the northern Apennines using 14 C deposit ages.…”

supporting

confidence: 65%

New insights into the onset and evolution of the central Apennine extensional intermontane basins based on the tectonically active L’Aquila Basin (central Italy)

et al. 2017

View full text Add to dashboard Cite

show abstract

supporting

confidence: 65%

New insights into the onset and evolution of the central Apennine extensional intermontane basins based on the tectonically active L’Aquila Basin (central Italy)

et al. 2017

View full text Add to dashboard Cite

show abstract

“…using cosmogenic nuclide concentration in alluvial sediment from sub-basins), the derived rates would vary by no more than a factor of, say, 20%, or the uncertainty of the method, whichever is greater (e.g. Cyr and Granger, 2008). A balance between erosion and rock uplift relative to the geoid is not the only possible mechanism for generating quasisteady topography.…”

Section: Natural Experiments In Steady Topographymentioning

confidence: 99%

“…Another useful element in a natural experiment is independent control on the history of erosion through time, as might be obtained from sediment volumes in a closed basin, or from cosmogenic nuclide analysis of deposited sediment (e.g. Cyr and Granger, 2008). Imagine, for instance, having a well-constrained sediment record in a hangingwall-basin lake that is fed by a single catchment in the footwall of a normal-fault block.…”

Section: Ingredients Of a Natural Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Natural experiments in landscape evolution

Tucker

2009

Earth Surf Processes Landf

View full text Add to dashboard Cite

A natural experiment in landscape evolution is a case study of landform development in which only one element varies significantly, and for which the driving forces, initial conditions, and/or boundary conditions are well constrained. Natural experiments provide a means of testing landscape evolution theory on the large space and time scales to which that theory applies. Natural experiments can involve either steady or transient conditions. Cases with steady conditions allow one to test predictions about the relationships among topography, erosion rates, and various attributes related to climate and material properties. Transient cases are valuable for distinguishing between models whose predictions might be similar, and therefore indistinguishable, under steady conditions. Essential ingredients of a natural experiment include minimal variation in all but one factor, good constraints on timing and/or rates, well-characterized processes, and high quality topographic data. Other useful ingredients include information about intermediate topographic states (such as a former valley profile revealed by strath terraces), and knowledge of the time history of erosion rates. In order to deepen our understanding of the physics and chemistry of longterm landscape evolution, there is a pressing need to identify natural experiments and develop the necessary databases to take advantage of them.

show abstract

“…Continuing tectonic uplift and erosion of the 3 km-thick, Jurassic to Miocene sedimentary succession subsequently removed rock layers above the Jurassic limestone hosting the cave system, most recently leaving surface and karst features that record the history of cave development at Frasassi (Mazzanti and Trevisan, 1978;Alvarez, 1999). Geomorphological studies of these features constrain the age of the oldest sulfuric acid-derived cave level in the Frasassi system between 350 000 and 1 million years (Mariani et al, 2007;Cyr and Granger, 2008). N. ictus is endemic to the Frasassi cave system.…”

Section: Discussionmentioning

confidence: 99%

A novel symbiosis between chemoautotrophic bacteria and a freshwater cave amphipod

et al. 2009

View full text Add to dashboard Cite

Symbioses involving animals and chemoautotrophic bacteria form the foundation of entire ecosystems at deep-sea hydrothermal vents and cold seeps, but have so far not been reported in terrestrial or freshwater environments. A rare example of a terrestrial ecosystem sustained by chemoautotrophy is found within the sulfide-rich Frasassi limestone cave complex of central Italy. In this study, we report the discovery of abundant filamentous bacteria on the exoskeleton of Niphargus ictus, a macroinvertebrate endemic to Frasassi. Using 16S rDNA sequencing and fluorescence in situ hybridization (FISH), we show that N. ictus throughout the large cave complex are colonized by a single phylotype of bacteria in the sulfur-oxidizing clade Thiothrix. The epibiont phylotype is distinct from Thiothrix phylotypes that form conspicuous biofilms in the cave streams and pools inhabited by N. ictus. Using a combination of 13 C labeling, FISH, and secondary ion mass spectrometry (SIMS), we show that the epibiotic Thiothrix are autotrophic, establishing the first known example of a non-marine chemoautotroph-animal symbiosis. Conditions supporting chemoautotrophy, and the N. ictus-Thiothrix association, likely commenced in the Frasassi cave complex between 350 000 and 1 million years ago. Therefore, the N. ictus-Thiothrix symbiosis is probably significantly younger than marine chemoautotrophic symbioses, many of which have been evolving for tens to hundreds of million years.

show abstract

Dynamic equilibrium among erosion, river incision, and coastal uplift in the northern and central Apennines, Italy

Cited by 109 publications

References 29 publications

New insights into the onset and evolution of the central Apennine extensional intermontane basins based on the tectonically active L’Aquila Basin (central Italy)

New insights into the onset and evolution of the central Apennine extensional intermontane basins based on the tectonically active L’Aquila Basin (central Italy)

Natural experiments in landscape evolution

A novel symbiosis between chemoautotrophic bacteria and a freshwater cave amphipod

Contact Info

Product

Resources

About