Fig. 108. Fossil footprints in the strata 01 the new red sandstone. 



THE CRUST OF THE EARTH; 



OR, FIKST NOTIONS OF GEOLOGY. 



CHAPTEE VII. 



176. Fossil foraminifera 177. Fossil infusoria Researches of Ehrenberg. 

 178. Marine deposits at great heights, produced by former undula- 

 tions of the land. 179. Organic deposits show that the same parts 

 of the land have undergone a series of alternate elevations and depres- 

 sions. 180. Example of the Portland beds. 181. Fossil footsteps. 

 182. Such traces common in the new red sandstone, at Hesseburg, and 

 near Liverpool. 183. Footprints of birds. 18)4.. FossU rain-dropa 

 and ripple-marks. 185. Conclusion. 



LARDNER'S MUSEUM OF SCIENCE. 

 No. 143. 



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