slushball Earth

E779331

Slushball Earth is a hypothesis proposing that during ancient global glaciations, Earth’s oceans were mostly ice-covered but retained thin equatorial melt zones of open or slushy water, allowing some climate and biological activity to persist.

All labels observed (1)

Label Occurrences
slushball Earth canonical 1

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf Earth system science concept ⓘ
alternative to Snowball Earth hypothesis ⓘ
paleoclimate hypothesis ⓘ
addressesQuestion how life survived extreme Neoproterozoic glaciations ⓘ
how sedimentary and geochemical records formed under near-global ice cover ⓘ
assumes equatorial insolation sufficient to maintain melt zones ⓘ
high planetary albedo due to extensive ice cover ⓘ
challengedBy interpretations favoring fully ice-covered Snowball Earth conditions ⓘ
concernsTimePeriod Neoproterozoic Era ⓘ
approximately 720 to 635 million years ago ⓘ
contrastsWith Snowball Earth ⓘ
describes Earth surface conditions during some Cryogenian ice ages ⓘ
differsFrom Snowball Earth by allowing open or slushy equatorial oceans ⓘ
field Earth system modeling ⓘ
geology ⓘ
paleobiology ⓘ
paleoclimatology ⓘ
hasComponent equatorial open-water or slushy-water belts ⓘ
thick sea ice at mid to high latitudes ⓘ
hasConsequence allows continued biogeochemical cycling under ice-dominated conditions ⓘ
permits refugia for marine organisms near the equator ⓘ
hasMainIdea Earth’s oceans were mostly ice-covered during certain ancient glaciations ⓘ
some climate and biological activity could continue despite extensive ice cover ⓘ
thin equatorial melt zones of open or slushy water persisted ⓘ
implies ongoing hydrological cycle under extensive ice cover ⓘ
reduced but nonzero global biological productivity ⓘ
some exchange of gases between ocean and atmosphere during glaciations ⓘ
proposes equatorial regions with seasonally or permanently reduced ice thickness ⓘ
global sea ice cover that is not completely solid and continuous ⓘ
relatedConcept Snowball Earth ⓘ
evolution of early complex life ⓘ
global glaciation ⓘ
paleogeography of Neoproterozoic continents ⓘ
sea-ice dynamics ⓘ
relatesTo Cryogenian Period ⓘ
Marinoan glaciation ⓘ
Neoproterozoic global glaciations ⓘ
Sturtian glaciation ⓘ
status actively debated in the scientific literature ⓘ
supportedBy climate modeling studies that produce partially ice-covered oceans ⓘ
fossil evidence of photosynthetic and heterotrophic life during glacial intervals ⓘ
geological evidence inconsistent with a completely frozen ocean ⓘ
usedToExplain paleontological evidence of active marine ecosystems during glacial intervals ⓘ
persistence of marine photosynthesis during global glaciations ⓘ
presence of banded iron formations and other chemical sediments during glaciations ⓘ
sedimentary evidence for open-water or dynamic sea-ice conditions ⓘ
survival and diversification of early eukaryotes during Cryogenian ice ages ⓘ

How these facts were elicited

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.