Ancient glaciers eroded many of the valleys, creating space for the lakes as they melted at the end of the last Ice Age, approximately 8,000 b.c.
The last ice age ended approximately 10,000 years ago.
yeah if there's running into a cash short or something there's some things some purchases i make that i will do always on credit card just so i have a record of them just like when i take all my cats down to the vet i always pay that on credit card