Answer:

tarpit

Answer	Crossword Clue
TARPIT	La Brea feature
TARPIT	Sticky situation?
TARPIT	Good place to hunt fossils

TARPIT	La Brea attraction
TARPIT	Geological preservation phenomenon
TARPIT	Asphalt trap
TARPIT	Rich source of fossils, perhaps
TARPIT	Mammoth trapper
TARPIT	Mammoth catcher
TARPIT	Natural geological trap
TARPIT	Site of some mammoths' demise

TARPIT	Fossil-preserving spot
TARPIT	Mammoth-preserving locale
TARPIT	Downtown L.A. attraction
TARPIT	Fossil source
TARPIT	Fossil preserver
TARPIT	La Brea, Calif., phenomenon
TARPIT	Archaelogical site
TARPIT	Likely fossil location

TARPIT	Mastodon trap
TARPIT	Fossil-rich location
TARPIT	Mammoth snagger
TARPIT	La Brea, for one
TARPIT	Archaeological treasure trove