Heere, H. 1984 3 August Black Mesa, Cimarson Co. Oklahoma arrived here ~ 1800 and walked around flats and lower slopes for 1-1/2 hours. Still very light. Saw juvenile Holbrookia maculata in flat, open grass beside the road, which responded to approach w/ fast, straight dashes for >= 0.5 m. Saw a Sceloporus undulatus which escaped in boulders, and an adult ? Grotaphytus collaris. I found the collared lizard inactive under a lava rock in a flat grassy place strewn w/ them; it ran a few meters away and under a flat rock, where it took refuge in abanon. The soil was too dry to dig much w/ little hands or pocket knife (broke a point). Camped at Black Mesa State Park, ~ 8-10 rd. miles away. 4 August Back to Black Mesa ~ 0700 and walked around 'til >1200. Thus today a team from the MRZ scaled the highest point in Oklahoma in a morning, at 4973 ft. The Mesa is a rimrock, several miles long, that seems to run WSW to ENW. We walked up the ~ S facing aspect. The top is a plateau bordered on the ~N by a meandering canyon, surrounded by rimrock. As one leaves the grassy flats the slopes have juniper, cholla and prickly pear and small barrel cacti, and shrubs. The rocks are generally light, but the rimrock is dark reddish brown lava and there are cascades of the latter that reach and spread out down the slopes at intervals.