[Geology2] Sauropods in Argentina kept their eggs warm near geothermal vents

Sauropods in Argentina kept their eggs warm near geothermal vents
PhysOrg.com [USA], June 30, 2010

Paleontologists from the US and Argentina found the nesting grounds in
the Sanagasta Valley in La Rioja Province in northwest Argentina. The
nesting sites are the first to show definitively that some neosauropod
dinosaurs had specific nesting grounds they returned to year after year,
as many migratory birds do today. The researchers working in the field
last summer were Gerald Grellet-Tinner from the Field Museum in Chicago,
US, and doctoral student Lucas Fiorelli, from the Regional Research
Center for Scientific Investigation and Technology Transfer (CRILAR) in
La Rioja, Argentina. They discovered about 80 clutches of eggs at
Sanagasta, all within three meters of hydrothermal vents. The nests
usually contained from 3 to 12 eggs, but some spread wide, with up to 35
eggs stacked in two rows over an area of up to 1.8 square meters. The
stacking indicates the clutches were buried in dug-out holes rather than
on the surface.

http://www.physorg.com/news197094613.html

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