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меловой период stresses
geochron.	Cretaceous period (хрон. MichaelBurov); Cretaceous (MichaelBurov); Cretaceous period (MichaelBurov)
geol.	chalk (Chalk); Cretaceous period; Cretaceous (the Cretaceous); Chalk; Chalk period; Cret. period (MichaelBurov)
Makarov., geol.	the Cretaceous (последний период мезозойской эры)

меловой период: 7 phrases in 3 subjects

Geochronology	3
Geology	3
Paleontology	1