The Pleistocene epoch is a geologic epoch which began around 2.6 Mya (Million years ago) and came to an end around 11,700 BP (Before Present). It is characterized by lower sea levels than the present epoch and colder temperatures.
https://www.youtube.com/watch?v=71l9lzLsBRc&t=1s Meltwater Pulse 1A is scientist's name for a period during the warmup from the last glacial period (as the Earth's axis slowly tilted more in the direction of the sun over 10,000 years or so, warming especially the northern polar regions) when a gradual ice retreat turned into a torrent of meltwater, and sea…
"A new study shows an ancient ice sheet retreated at a startling 2,000 feet per day, shedding light on how quickly ice in Antarctica could melt and raise global sea levels in today’s warming world".
Ice age data has revealed a large ice sheet covering Eurasia retreated at the rate of 2,000 feet per day, raising new concerns about future ice sheet retreat and rising sea levels.