Field Trip. June 1, 1932. about 2 years ago, I saw a kangaroo rat crushed on the road leading to City Creek, on the sage brush flats directly west of the city. The evening of June 1, I placed 52 mouse traps in the sage brush on this flat to see what could be taken. Only 3 Peromyscus were collected from the entire set. This would indicate very little life of any sort on the flat. The soil is white clay and not very sandy, if any. From the residential section the elevation rises abruptly over a clay bluff about 100 ft high and then rises very gradually for about one mile. Then the rise continues in low rolling hills covered by juniper and sage. A very few straggly junipers are scattered over this area referred to as the flats.