I have been using the concept of lithic-rich (L-R) and lithic-poor (L-P) environments in my writings of pre-agriculture peoples since the early 2000s. Yet, it only recently occurred to me that I had never defined the two terms as I understand them and there is sparse literature on the subject, especially the behavior associated with each. So, this paper is a mind dump of my observations and opinions of lithic assemblages from around the world as it relates to these two environments. Also, it is written with the assumption that the sites and assemblages, discussed herein, are pristine. In different words, they have not been disturbed by collectors and/or archaeologists. There are no references at the end and the only citations are to my own web papers. Click here to see the entire presentation. Read the entire webpage.