A Neoproterozoic snowball Earth.¶
Hoffman, P. F., Kaufman, A. J., Halverson, G. P., & Schrag, D. P. (1998). A Neoproterozoic snowball Earth. Science, 281(5381), 1342-1346.
Cited by¶
1 citation across 1 artifact.
Each citation links to the sentence it supports in the citing article.
Primes¶
- Deep Time
- Effective deep-time reasoning across domains requires several operational principles, of which Hoffman et al. (1998) provided a canonical example: their Neoproterozoic snowball-Earth synthesis integrates stratigraphy, paleomagnetism, isotope geochemistry, glaciology, and biogeochemistry across an ~700-million-year horizon to argue for global glaciation followed by greenhouse rebound—exactly the kind of multi-substrate, multi-timescale reconstruction that operational deep-time reasoning must perform.
This sourceIntegrates stratigraphy, paleomagnetism, carbon-isotope geochemistry, glaciology, and biogeochemistry to argue for global Neoproterozoic glaciation followed by greenhouse rebound (~700 Ma).
Supported in partVerified against the publisher's abstract
Abstract supports the snowball-Earth to greenhouse-rebound core, but not the multi-discipline integration, ~700 Ma horizon, or deep-time reasoning principle.
“This collapse can be explained by a global glaciation (that is, a snowball Earth), which ended abruptly when subaerial volcanic outgassing raised atmospheric carbon dioxide to about 350 times the modern level. The rapid termination would have resulted in a warming of the snowball Earth to extreme greenhouse conditions.”
- Effective deep-time reasoning across domains requires several operational principles, of which Hoffman et al. (1998) provided a canonical example: their Neoproterozoic snowball-Earth synthesis integrates stratigraphy, paleomagnetism, isotope geochemistry, glaciology, and biogeochemistry across an ~700-million-year horizon to argue for global glaciation followed by greenhouse rebound—exactly the kind of multi-substrate, multi-timescale reconstruction that operational deep-time reasoning must perform.
Verification¶
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