Geoscience Reference
In-Depth Information
for telling time back when sauropods roamed the ancient Patagonian
landscape. In a sense, each layer represents a page in the topic of geo-
logic history for Auca Mahuevo. By applying the geologic principle of
superposition, we can leaf through that topic page by page, from
older, lower layers into younger, higher layers. Eggs and embryos
found in the lowest rock layers were laid at some time before eggs
Stratigraphic
section of Auca
Mahuevo
showing the four
egg layers and
the occurrences
of theropod and
sauropod bones.
