tracks  search
RTbiogenic structures
 ichnofossils
 lebensspuren
 sedimentary structures
 trails
SNBefore 1977, also search tracks and trails. Includes use as the sedimentary structure as well as the paleontologic feature. Also index ichnofossils OR lebensspuren if applicable. See lists F and K.
tracks and trails  search
SNNot a valid index term for GeoRef after 1971. Used in subfiles E, N, T, and B. Use tracks or trails as separate terms.