Time

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(Table of geologic time)
(Table of geologic time)
Line 142: Line 142:
| rowspan="3" colspan="2" style="{{Color-Ordovician}}" | [[Ordovician]]
| rowspan="3" colspan="2" style="{{Color-Ordovician}}" | [[Ordovician]]
| style="{{Color-Late-Ordovician}}" | [[Late Ordovician|Upper/Late]]
| style="{{Color-Late-Ordovician}}" | [[Late Ordovician|Upper/Late]]
-
| rowspan="3" style="background-color:white" | [[Invertebrate]]s diversify into many new types (e.g., long [[orthoconic|straight-shelled]] [[orthocerida|cephalopods]]). Early [[coral]]s, articulate [[brachiopod]]s (''Orthida'', ''Strophomenida'', etc.), [[Bivalvia|bivalves]], [[nautiloid]]s, [[trilobite]]s, [[ostracod]]s, [[bryozoa]], many types of [[echinoderms]] ([[crinoid]]s, [[Cystoidea|cystoids]], [[Asteroidea|starfish]], etc.), branched [[graptolite]]s, and other taxa all common. [[Conodont]]s (early [[plankton]]ic [[vertebrate]]s) appear. First [[Plantae|green plant]]s and [[fungus|fungi]] on land. Ice age at end of period.
+
| rowspan="3" style="background-color:white" | [[Invertebrate]]s diversify into many new types (e.g., long [[orthoconic|straight-shelled]] [[orthocerida|cephalopods]]). Early [[coral]]s, articulate [[brachiopod]]s (''Orthida'', ''Strophomenida'', etc.), [[Bivalvia|bivalves]], [[nautiloid]]s, [[trilobite]]s, [[ostracod]]s, [[bryozoa]], many types of [[echinoderms]] ([[crinoid]]s, [[Cystoidea|cystoids]], [[Asteroidea|starfish]], etc.), branched [[graptolite]]s, and other taxa all common. [[Conodont]]s (early [[plankton]]ic [[vertebrate]]s) appear. First [[Plantae|green plant]]s and [[fungus|fungi]] on land. Ice age at end of period. First sharks appear (c.450–420 MYA).
| style="{{Color-Late-Ordovician}}" | 460.9 ± 1.6 <sup>*</sup>
| style="{{Color-Late-Ordovician}}" | 460.9 ± 1.6 <sup>*</sup>
|-
|-

Revision as of 01:20, 28 January 2009

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