Sentence examples for periods approximately from inspiring English sources

Purbeck Beds, unit of sedimentary rocks exposed in southern England that spans the boundary between the Jurassic and Cretaceous periods, approximately 145 million years ago.

During the Permian and Triassic periods (approximately 300 to 200 million years ago), Paleo Tethys formed an eastward-opening oceanic embayment of Pangea in what is now the Mediterranean region.

The section properly called Alpine is the border district that includes the highest masses, made up of weathered Hercynian rocks, dating from the Carboniferous and Permian periods (approximately 360 million to 250 million years ago).

Second, the observed spectra were well described by the GMPEs at intermediate periods (approximately 0.3 2 s) for aftershock events of Mw ≥ 6.3.

IGWs are permanently present surface gravity waves in the ocean with periods longer than the longest periods (approximately 30 s) of wind-generated waves.

Another broad maximum of comparative lesser amplitude is found to be very prominent near periods approximately 45 to 70 days below 90 km.

The force signals fluctuated periodically with rotation angle and the corresponding period approximately equal to the interval of angular lug spacing.

Two main periods in the development of the literature are discernible: the Vedic period, approximately 1500 200 bc; and, somewhat overlapping it, the classical period, approximately 500 bc ad 1000.

Maglemosian industry, a tool culture of northern Europe dating from the postglacial period, approximately 9000 to 5000 bc.

Ms. Koenigsberg argues that the period approximately from the 1840's to 1901, when Queen Victoria died, is appealing to contemporary Americans who crave forms of beauty, ease and opulence that have been missing from their harried lives.

During the drought period, approximately 80% of total stand transpiration came from groundwater evapotranspiration.