Extreme δ18O signatures in zircon from the Saglek Block (North Atlantic Craton) document reworking of mature supracrustal rocks as early as 3.5 Ga
Overestimation of threat from 100 Mt–class airbursts? High-pressure evidence from zircon in Libyan Desert Glass
Extreme oxygen isotope zoning in garnet and zircon from a metachert block in mélange reveals metasomatism at the peak of subduction metamorphism
Construction and destruction of an autogenic grade system: The late Holocene Mekong River delta, Vietnam
COVER: Wire silver with calcite from Kongsberg, Norway (7 cm tall). Wire silver is the first known example of mineral growth by solid-state ion conduction in nature. See “Natural solid-state ion conduction induces metal isotope fractionation” by Anderson et al., p. 617–621. Specimen from Dave Bunk Minerals.
Photo by: Jeff Scovil
Cover design by: Eric Christensen
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