Vol. 310, Issue 3, 2010

Science Paper
Reduction of Bedrock Blocks as Corestones in the Weathering Profile: Observations and Model
R. C. FletcherS. L. Brantley
Blocks of metavolcaniclastic rock exposed at the surface in upland catchments of the Espiritu Santo and Mameyes rivers within the Luquillo Experimental Forest (Puerto Rico) are interpreted as corestones, reduced...
Science Paper
The Role of Biomineralization in the Origin of Sepiolite and Dolomite
Santiago LegueyDavid Ruiz De LeónAna Isabel RuizJaime Cuevas
Sepiolite is an important industrial mineral whose mechanism of formation and detailed origin are still not clear. Sepiolite is frequently found with dolomite, Mg-smectites or palygorskite in the Intermediate Unit...
Science Paper
Evaluating the Ca Isotope Proxy
Matthew S. Fantle
The use of Ca isotopes as a proxy for mass flux imbalances in the Ca cycle is evaluated critically. A compiled Ca isotope record for the last 45 Ma, derived...