. Popular science monthly. *J&iu&t:~::~ -. *--:• Fig. 3. Petrified Wood. Flora, Miss., June, 1912. 468 THE POPULAR SCIENCE MONTHLY. Pig. 4. Petrified Wood. University of Mississippi. part of it is exogenous, good specimens of palm-wood are found in southMississippi. Most of the petrified wood in the state is found in the Lafayette for-mation hut some is found lower down in the Wilcox and other Tertiaryformations. Dr. Hilgard surmised that a great part, if not all, of thesilicified wood found in the upper formation was derived ultimatelyfrom the several lignitic stages of the Tertiary. The petr
. Popular science monthly. *J&iu&t:~::~ -. *--:• Fig. 3. Petrified Wood. Flora, Miss., June, 1912. 468 THE POPULAR SCIENCE MONTHLY. Pig. 4. Petrified Wood. University of Mississippi. part of it is exogenous, good specimens of palm-wood are found in southMississippi. Most of the petrified wood in the state is found in the Lafayette for-mation hut some is found lower down in the Wilcox and other Tertiaryformations. Dr. Hilgard surmised that a great part, if not all, of thesilicified wood found in the upper formation was derived ultimatelyfrom the several lignitic stages of the Tertiary. The petrified forest, or speaking more accurately, the group of silici-fied logs, which I wish particularly to mention in this brief article, Flora, seventeen or eighteen miles northwest of Jackson, thestate capital. Here is a large field where erosion is actively taking placeat the present time. Throughout the area are scattered logs and frag-ments in varying stages of disintegration. An amphitheater some twenty or twenty-five feet deep and about onehundred and fifty feet in diameter, where the Columbia loam and theLafa
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