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Mud fossils

January 1, 1997

At the close of the 18th century, the haze of fantasy and mysticism that tended to obscure the true nature of the Earth was being swept away. Careful studies by scientists showed that rocks had diverse origins. Some rock layers, containing clearly identifiable fossil remains of fish and other forms of aquatic animal and plant life, originally formed in the ocean. Other layers, consisting of sand grains winnowed clean by the pounding surf, obviously formed as beach deposits that marked the shorelines of ancient seas.

Publication Year 1997
Title Mud fossils
DOI 10.3133/70043849
Publication Type Report
Publication Subtype USGS Unnumbered Series
Series Title General Information Product
Index ID 70043849
Record Source USGS Publications Warehouse