📁 痕迹化石
Trace fossils, or ichnofossils, are the preserved evidence of animals activity found in the rock record. They range from dinosaur footprints to worm burrows to root traces. This category is for any website dealing with the study of trace fossils.
条目 (8+)
The Ancient Bristlecone Pine - Dendrochronology
http://www.sonic.net/bristlecone/dendro.html
Fundamentals of Sample Age Determination from its Amino Acid Racemization
http://www.angelfire.com/linux/hortola/aminoeng.htm