Changes

==Global climatic effect of cycles==

==Global climatic effect of cycles==

The earth's climate has ranged from times of cooler temperatures (icehouse) to times of warmer temperatures (greenhouse).<ref name=ch09r50>Read, J., F., Horbury, A., D., 1993, [http://archives.datapages.com/data/specpubs/resmi1/data/a067/a067/0001/0150/0155.htm Eustatic and tectonic controls on porosity evolution beneath sequence-bounding unconformities and parasequence disconformities on carbonate platforms], in Horbury, A., D., Robinson, A., G., eds., Diagenesis and Basin Development: AAPG Studies in Geology 36, p. 155–197.</ref> Continental glaciation characterizes icehouse conditions and causes large sea level changes because ice ties up large volumes of water. Sea level rises rapidly during glaciation and falls gradually during deglaciation. Sea level changes are small during greenhouse times because the ice volume was smaller.

The earth's climate has ranged from times of cooler temperatures (icehouse) to times of warmer temperatures (greenhouse).<ref name=ch09r50>Read, J., F., Horbury, A., D., 1993, [http://archives.datapages.com/data/specpubs/resmi1/data/a067/a067/0001/0150/0155.htm Eustatic and tectonic controls on porosity evolution beneath sequence-bounding unconformities and parasequence disconformities on carbonate platforms], in Horbury, A., D., Robinson, A., G., eds., Diagenesis and Basin Development: AAPG Studies in Geology 36, p. 155–197.</ref> Continental glaciation characterizes icehouse conditions and causes large sea level changes because ice ties up large volumes of water. Sea level falls during glaciation and rises during deglaciation. Sea level changes are small during greenhouse times because the ice volume was smaller.

The table below summarizes characteristics of fourth- and fifth-order sea level cycles during icehouse, greenhouse, and transitional periods.

The table below summarizes characteristics of fourth- and fifth-order sea level cycles during icehouse, greenhouse, and transitional periods.