There is a rock in the Pacific somewhere that has etched into it the sea level circa 1850. You can see the pic and see the level has not changed. Looked for the pic recently, and couldn’t find it.
Probably went the to the same place that uprooted tree did in the previous post....
In 1841, Thomas Lempriere, an amateur meteorologist at the Port Arthur penal station, cut a notch in rock on the Isle of the Dead, the main burying ground for the isolated colony in Tasmanias southeast. Re-surveyed more than 150 years later, this site continues to be monitored using tools of the 20th century, which can also detect vertical movement of land. The estimated rate of sea-level rise is about 1 mm/yr, near the lower end of the IPCC estimates.
The mark was made on the Isle of the Dead, Port Arthur, Tasmania in 1841.