Changes

==Regional climates==

==Regional climates==

Arid or humid conditions can occur simultaneously in different regions during icehouse or greenhouse periods. The aridity or humidity of a region strongly affects carbonate deposition and diagenesis. For example, carbonates deposited under arid conditions tend to be associated with evaporites, and carbonate sequences are partly to completely dolomitized. In humid regions where rainfall is greater, carbonates are subject to greater dissolution; therefore, vuggy porosity and karst features are common.

Arid or humid conditions can occur simultaneously in different regions during icehouse or greenhouse periods. The aridity or humidity of a region strongly affects carbonate deposition and [http://wiki.seg.org/wiki/Dictionary:Diagenesis diagenesis]. For example, carbonates deposited under arid conditions tend to be associated with evaporites, and carbonate sequences are partly to completely dolomitized. In humid regions where rainfall is greater, carbonates are subject to greater dissolution; therefore, vuggy porosity and [http://wiki.seg.org/wiki/Dictionary:Karst karst] features are common.

==Sea level and climate==

==Sea level and climate==

Long-term sea level cycles influence regional climates (Read, 1996). More humid conditions tend to prevail during deposition of transgressive system tracts, and more arid conditions tend to prevail during deposition of late highstand-lowstand system tracts. Climatic conditions of an area are likely to be arid when a platform interior is subaerially exposed during long-term, sea level late highstand and lowstand. From the Precambrian to the Silurian, the lack of land plants might have amplified this aridity. Humid conditions prevail when extensive shallow epicontinental seaways present during long-term transgressions cause increased rainfall.

Long-term sea level cycles influence regional climates.<ref name=ch09r49 /> More humid conditions tend to prevail during deposition of [http://wiki.seg.org/wiki/Dictionary:Transgressive_system_tract transgressive system tracts], and more arid conditions tend to prevail during deposition of late [http://wiki.seg.org/wiki/Dictionary:Highstand_systems_tract highstand]-[http://wiki.seg.org/wiki/Dictionary:Lowstand_system_tract_(LST) lowstand] system tracts. Climatic conditions of an area are likely to be arid when a platform interior is subaerially exposed during long-term, sea level late highstand and lowstand. From the Precambrian to the Silurian (see [http://www.stratigraphy.org/ICSchart/ChronostratChart2013-01.jpg International Chronostratigraphic Chart] for more information), the lack of land plants might have amplified this aridity. Humid conditions prevail when extensive shallow epicontinental seaways present during long-term transgressions cause increased rainfall.

==Sedimentation rate and climate==

==Sedimentation rate and climate==