This is a lot of matrix lot that contains plant fossils (mostly leaves, but also occasional seeds and cones) from a Miocene deposit in South Korea. Unfortunately, I do not know the exact locality, because this material contains some really nice plant fossils. This material is soft and somewhat chalky, like a fine-grained sandstone or mudstone.
Refer to the photo. You get the entire lot shown. This lot contains five pieces that weigh a combined total of 351 grams (or a little shy of 3/4 pound).