Just of the coastline of North America, in the last 15,000 years sea level has varied from over 100 metres (330 ft) below, to as high as 10 metres (33 ft) above its present level. That entire time, humans have lived in North America.
Why do paleoshorelines matter?
Paleoshorelines capture valuable records of environmental change and can tell us about modern shelf ecosystems. These structures can indicate distributions of seabed features that are habitat of marine life; they also may shed light on the location of coastal resources once used by humans, thus so are of archaeological significance.
- The Bering Land Bridge once stood above water, and the commonest explanation is that the Native Americans came over this land bridge. Now it is underwater.
- Once Doggerland stood above water, connecting Great Britain and Ireland to the rest of Europe.
- In a sudden event, the 1700 Cascadia earthquake caused the coastline from what are now British Columbia, Washington, Oregon and north California to "drop several feet."
- In Asia, the Yonaguni Monument once stood above sea level; whether the formations are human-made is still argued.
- Paleoshoreline reseach
- Paleoshoerlines of Pacific islands
- Paleoshorelines off Australia
- Shelf sand supply determined by glacial-age sea-level modes, submerged coastlines and wave climate
- Paleoshorelines off Tonga
- Paleoshoreline evidence for postglacial tilting in Southern Manitoba
- Paleoshorelines of Florida, USA
- Submerged Shorelines in the Southern California Borderland
- Paleoshorelines of Mono Lake, California, USA