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During the Ordovician and Silurian periods ( 500-410 million years ago ), Hạ Long Bay was deep sea.
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During and Ordovician
During the middle Ordovician Period ( about 480-440 million years ago ), a change in plate motions set the stage for the first Paleozoic mountain building event ( Taconic orogeny ) in North America.
During the Early Ordovician there was a great increase in the diversity of bivalve species and the dysodont, heterodont and taxodont dentitions evolved.
During the Ordovician period the collision of Laurentia, Gondwanaland, and Avalonia, referred to as the Taconic Orogeny, caused the formation to fold, thrust, and uplift above sea level, where later layers were eroded away and the schist was exposed.
During the Ordovician Period, about 450 million years ago, the North American continent was situated along the equator, and a warm shallow sea covered much of Minnesota.
During the Ordovician, what is now Eastern Europe was a shallow inland sea.
During the Ordovician and Silurian periods, the genus Dalmanites was widespread all over the world, inhabiting a variety of climates and sea conditions.
During the Ordovician, the small continent of Avalonia moved independently in a northeastern direction towards Baltica.
During and Silurian
During the Silurian, was readily available, so little water needed expending to acquire it.
During the early Silurian, they developed specialized cells, which were lignified ( or bore similar chemical compounds ) to avoid implosion ; this process coincided with cell death, allowing their innards to be emptied and water to be passed through them.
During the Silurian period, some magnesium substituted for some of the calcium in the carbonates, slowly forming harder ( dolomitic ) sedimentary strata in the same fashion.
During and periods
During intercrisis periods the educational facilities of the community have the possibility of remolding the perspectives and altering the behavior of vast numbers of human beings of every age and condition.
During fiscal years 1959 and 1960, there were 139 military and civilian students who came to the Institute for varying periods of special instruction.
During all this time Roy continued to paint, first only on weekends, and then, as the family business permitted, for longer periods.
During summer vacation periods these records are stored in the office of the principal.
During the Hellenistic and Roman periods, many of the existing buildings in the area of the Acropolis were repaired, due to damage from age, and occasionally, war.
During periods of major depression or mania ( in BPI ), functioning was on average poor, with depression being more persistently associated with disability than mania.
During periods of global warming, ice breaks off the poles and floats across submerged continents, carrying debris with it, he conjectured.
During periods of quiet, the corona is more or less confined to the equatorial regions, with coronal holes covering the polar regions.
During the long cruise periods of the mission, spacecraft operations are essentially suspended.
During older periods of the Greek language, loan words into Greek acquired Greek inflections, leaving thus only a foreign root word.
During a period of hyperinflation, bank runs, loans for 24-hour periods, switching to alternate currencies, the return to use of gold or silver or even barter become common.
During periods of particularly high demand for ammunition, such as after the November 2008 election of President Barack Obama, or after the 1994 Assault Weapons Ban in that country, factory ammunition can become considerably more expensive or even unavailable in stores.
During periods of submersion, thick layers of limestone were laid down over the old igneous and metamorphic rock.
During two of the coldest periods in the last 250 years ( 1780s and 1810s ), the frequency of hurricanes in the Jamaica region was unusually high.
During the course of all three periods, Ribbentrop met frequently with leaders and diplomats from Italy, Japan, Romania, Spain, Bulgaria, and Hungary.
During a meeting with General Douglas MacArthur, Dr. Honma produced blades from the various periods of Japanese history and MacArthur was able to identify very quickly what blades held artistic merit and which could be considered purely weapons.
During periods of exile and imprisonment, he gradually became a Marxist.
During the Counter Reformation and Baroque periods ( late 16th and 17th centuries ), the cult of Mary Magdalene saw a great, new popularity as the Catholic Church publicized her as an attractive, persusasive model of repentance and reform, in keeping with the goals of the reform Council of Trent ( 1545 – 63 ).
During periods when the river is low, the many beaches along the Nanay are popular destinations.
During the Roman periods it was renowned as the largest temple in Greece and housed one of the largest cult statues in the ancient world.
During the Baroque and Classical periods, recitative could appear in two basic forms: secco ( dry ) recitative, accompanied only by continuo, which was usually a harpsichord and a cello ; or accompagnato ( also known as strumentato ) in which the orchestra provided accompaniment.
During the more than 1500 years of their existence, the Benedictines have not been immune to periods of laxity and decline, often following periods of greater prosperity and an attendant relaxing of discipline.
During his periods of self-imposed isolation, Rudolf reportedly had affairs with his court chamberlain, Wolfgang von Rumpf, and a series of valets.
During periods away from Hawkwind duties, and after finally leaving the group in 1979, Calvert worked on his solo career, his creative output including albums, stage plays, poetry, and a novel.
During and million
During World War 2, about 7.5 million persons were enrolled in courses organized under two special programs administered by state and local school authorities: ( 1 ) Vocational Education for National Defense, and ( 2 ) War Production Training.
During the first 11 months of 2006, net imports grew by 21 percent to $ 1. 95 billion, while exports stood at $ 895 million, up 0. 3 percent from the same period in 2005.
During January – February 2007, Armenia ’ s trade with the European Union totaled $ 200 million.
During January – February 2007, Armenia ’ s trade with Russia and other former Soviet republics was $ 205. 6 million ( double the amount from the same period the previous year ), making them the country ’ s number one trading partner.
During the first 11 months of 2006, the volume of Armenia ’ s trade with Russia was $ 376. 8 million or 13. 2 percent of the total commercial exchange.
During the first 11 months of 2006, U. S .- Armenian trade totaled $ 152. 6 million.
During its lifetime, the CPC series sold approximately three million units.
During the Prohibition Era, Capone controlled large portions of the Chicago underworld, which provided The Outfit with an estimated US $ 100 million per year in revenue.
During the First World War the German army used horses for logistics, 1. 4 million of them, in the 1939 – 45 war it used 2. 7 million horses.
During the Atlantic Slave Trade, 9. 4 to 12 million people from North, West, West-Central and South-east Africa survived transportation to arrive in the Western Hemisphere as slaves.
During the same year, bird watching, photography, and other non-consumptive uses of waterfowl contributed an additional $ 192. 8 million to Michigan ’ s economy.
During the XII and XIII centuries many encyclopedic works have been written. Among them De proprietatibus rerum by Bartholomeus Anglicus ' ( 1240 ) was the most widely read and quoted encyclopedia in the High Middle Ages while Vincent of Beauvais's Speculum Majus ( 1260 ) was the most ambitious encyclopedia in the late-medieval period at over 3 million words.
During its theatrical run the film grossed $ 2. 4 million, currently holds a 100 % positive rating on Rotten Tomatoes and has developed a cult following.
During the 1980s, gas sales accounted for $ 300 million a year in export revenues ( 56 % of the total ).
During the next million years a process of encephalization began, and with the arrival of Homo erectus in the fossil record, cranial capacity had doubled to 850cc.
During the next million years a process of encephalization began, and with the arrival of Homo erectus in the fossil record, cranial capacity had doubled.
During the same period the government expenditure was £ 47. 6 million.
During Indian Prime Minister Manmohan Singh's May 2011 visit to Kabul, it was announced that India's total aid to Afghanistan reached $ 2 billion after a package of $ 500 million was added.
During 1991, loan negotiations with multilateral and bilateral lending institutions brought Honduras US $ 39. 5 million in United States development assistance, US $ 70 million in balance-of-payments assistance in the form of cash grants, and US $ 18. 8 million in food aid.
During the reign of Elizabeth and shortly afterward, the population grew significantly: from three million in 1564 to nearly five million in 1616.
During the political decentralization of the late Hohenstaufen period, the population had grown from an estimated 8 million in 1200 to about 14 million in 1300, and the number of towns increased tenfold.
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