网络分析表明，锌和镉硫化物在地质史上同步风化，在锌缺乏的情况下，镉可以作为光合途径的合适替代品。
paleoclimatology & paleoceanography
Posted inNews
Ancient, Acidic Lakes May Have Harbored Life
A new analysis of South African sediments hints that acidic lakes may have leached minerals necessary for biotic life.
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Red Rocks: Using Color to Understand Climate Change
A recent study on hematite formation during the Triassic may help predict the effects of climate change on contemporary monsoonal environments.
Posted inFeatures
Cratons, Why Are You Still Here?
How have these continental relics from Earth’s early history survived the plate tectonic mixing machine?
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A Dip in Atmospheric Carbon May Have Facilitated Dinosaur Dispersal
Herbivorous dinosaurs migrated north across Pangea beginning about 214 million years ago, coincident with a downturn in atmospheric carbon dioxide levels.
Posted inResearch Spotlights
How Did Diatoms Evolve to Swap Zinc for the Toxic Metal Cadmium?
New network analysis suggests that zinc and cadmium sulfides weathered simultaneously in geological history, making cadmium a suitable substitute in photosynthetic pathways when zinc was scarce.
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Geologists Have a New Tool for Reconstructing the Ancient Climate
A new study of seafloor sediments finds that the temperature record in the early Paleozoic corresponds to significant shifts in the diversity of life on Earth.
Posted inEditors' Highlights
Watering Down the Mantle
The cooling of planet Earth over time increased the water carrying capacity of the mantle and could have shrunk the oceans.
Posted inResearch Spotlights
Ice Age Testing Reveals Challenges in Climate Model Sensitivity
Increased reflection of incoming sunlight by clouds led one current-generation climate model to predict unrealistically cold temperatures during the last ice age.
Posted inScience Updates
Improving Access to Paleoclimate Data
Paleoclimate databases are powerful tools for improving climate models. The recent work of speleothem researchers offers lessons on creating a lasting database and fostering the needed mindset.