Laci Gerhart et al. studied trees from these areas to conclude that trees that existed during the Pleistocene were physiologically constrained by low amounts of carbon dioxide.
Laci Gerhart et al. studied trees from these areas to conclude that trees that existed during the Pleistocene were physiologically constrained by low amounts of carbon dioxide. Along with the Blancan and Irvingtonian fauna, the group of fauna named for of these regions gives its name to the class of animals that crossed the Bering Land Bridge. Families of Halobacteriaceae found in one of these lagerstattes may be responsible for the production of methane within it. The most notable one of these structures formed in an underwater basin during the Tertiary period, since a fault caused fossil fuels to seep upward and form dry bitumen. These structures are a goodsource of fossils since animals seem to become stuck in the asphalt within. For 10 points, name these sticky structures, some of which can be found at La Brea.
Laci Gerhart et al. studied trees from these areas to conclude that trees that existed during the Pleistocene were physiologically constrained by low amounts of carbon dioxide.
tar pits [or tar lake  accept  asphalt pit or asphalt lake before "asphalt" accept  La Brea tar pits]