484 THE SCIENTIFIC MONTHLY
rim 400 feet Ita bottom is aboat 50 feet above sea level. The waUa are mostly very steep aad there is the usual surrounding rim of ejecta. Lumholtz found a fine large circular crater in the lava plain a short distance northeast of Sierra del Pinacate, to which he has given the name Crater Elegante. It is eiic miles northeast of the central peak, near the edge of a plain covered by a thin lava sheet. He esti- mates its depth at 800 feet and a rough measurement gave a mile
���diameter. It is rimmed by a ridge rising about 150 feet above the surface of the plain. The bottom is flat and talus rises about half way up the sides. The view given by Lumholtz shows alternations of regu- larly bedded material.
The Aiton craters in southern New Mexico, thirty miles nortli-
��3. 10. LOOKING NOBTBEAB* INTO KiLBDttN CRATEB NEAR AlTON, IQ ■OOtheitl NeW
Meiloo. Tbe btnck itreah la a tbln shett ot Lbts much older than the hole. Note ranch to right of center of view. PhotoBrephed bj W. T. Lee.
�� �
