When Pleistocene glaciers receded about 15, 000 years ago, glacial debris such as till was left behind to cover most of the area that would become the island.

When the remains were dated to some 26, 000 years ago it was thought the Red Lady lived at a time when an ice sheet of the most recent glacial period, in the British Isles called the Devensian Glaciation, would have been advancing towards the site, and that consequently the weather would have been more like that of present day Siberia, with maximum temperatures of perhaps 10 ° C in summer ,-20 ° in winter, and a tundra vegetation.

When glacial debris blocked this path, flow was redirected westward through Paugus Bay into the Winnipesaukee River.

When the glacial torrents found cracks in the hard capstone, the water poured through to flush out the soft middle layer.

When there are three or more of these cirque headwalls and arêtes joined together to form a single peak it creates a pyramid shape with very steep walls and it is called a horn or glacial horn.

When a large eruption occurred in 1996, geologists knew well in advance that a glacial burst was imminent.

When water collected in the depression, it became the habitat of the plants and animals whose remains were preserved there when the sinkhole was buried by glacial outwash and till during the Pleistocene Epoch, two million to 11, 000 years ago.

When lava flows were erupted from Tuber Hill, they interacted with the valley-filling glaciers on its southern flank and produced a glacial meltwater lake.

When the American Indians first arrived in what is now Iowa more than 13, 000 years ago, they were hunters and gatherers living in a Pleistocene glacial landscape.

When sea levels were low during the last glacial maximum, the Arafura Shelf, the Gulf of Carpentaria and Torres Strait formed a large flat land bridge connecting Australia and New Guinea and easing migration of humans from Asia into Australia.

When Gallifrey appears over Earth, it appears as a huge orange sphere with lakes of lava.

When the climate returned to savanna grasslands — wetter than today's climate — and lakes reappeared in what is the modern Ténére desert, a population practicing hunting, fishing, and cattle husbandry.

When water becomes available, either during the wet season or through proximity to rivers and lakes, the vegetation explodes into shades of green with a wide variety of beautiful flowers.

When the Canal Clearance Operations were completed, the Suez Canal and its lakes were considered 99 % clear of mines.

When Sam decides to go back to America for his college reunion in New Haven, Fran spends the summer months on the lakes near Montreux and Stresa, where she has a romance with Arnold Israel.

When looking at the town from above, it looks like it could be an island due to the surrounding lakes.

When settlers arrived in what is now Susquehanna County they found rolling hills, clear lakes, and mountain streams with an abundance of natural resources like timber and bluestone.

When the water levels drop, the dolphins move either into the main river channels or into large lakes in the forest, and take advantage of the concentrated prey in these reduced water bodies.

When he was a child, he would spend many summers near or on the Kawartha lakes.

When it dried, it left behind two modern lakes, Poopó Lake and Uru Uru Lake, and two major salt deserts, Salar de Coipasa and the larger Salar de Uyuni.

When the normally barren Lake Eyre filled during 1974 to 1976, for example, only a handful of pelicans remained around the coastal cities: when the great inland lakes dried again, the population dispersed once more, flocks of thousands being seen on the northern coasts.

When kettles fill with water, they are known as kettle lakes.

When reservoirs were created to assure a steady supply of water for the locks, those lakes were included within the Zone.

When the scheme was commissioned, a fish rescue was undertaken to transfer the char from Llyn Peris to other local suitable lakes and it is believed that due to the very variable water levels in Llyn Peris, Arctic char are now absent from the lake.

When originally built by the state of New York, the North Campus was provided with two Interstate exits, from I-290 and I-990, its own internal parkway, the John James Audubon Parkway, and two small lakes created from Ellicott Creek.

When not controlled, water hyacinth will cover lakes and ponds entirely ; this dramatically impacts water flow, blocks sunlight from reaching native aquatic plants, and starves the water of oxygen, often killing fish ( or turtles ).

When Polybius wrote of the account which was used by Strabo 7. 327, there were near the Mt Candavia sector of the Via Egnatia ' the lakes near Lychnidus with their own self-supporting factories for pickling fish '.

When the Erie Canal was redesigned and reconstructed to form the New York State Barge Canal in the early 20th century, the engineers made use of natural rivers and lakes where possible.

When Rother Valley Country Park was built in 1980s, they used water from The Moss to fill the lakes.

When the rivers and lakes become free of ice then training is resumed outdoors.

When upbound in the lakes, there are green numbered buoys that mark the ' left ' or port side of the channel.

When the cold air from these storms moves over the lakes, it is warmed by the waters below.

When a cyclonic system moves over the lakes, its power is intensified by the jet stream above and the warm waters below.

When he established his new capital at Dadu, Kublai Khan he enlarged the artificial lakes that had been created a century earlier by the Jin Dynasty, and built up the island of Oinghua, creating a striking contrast between curving banks of the lake and garden and the strict geometry of what later became the Forbidden City of Beijing.

When I show up he will know you are a good wife to have told him about it ''.

When the Know-nothings get control, it will read, All men are created equal except Negroes and foreigners and Catholics.

When the reactionary response is thus bolstered by an intellectual defense, the characteristics of that defense are explicable only in terms of the basic attitudes of unanalyzed reaction.

When combined with the metaphysical notion that pure forms of this universe are best appreciated when least embodied in a material substratum, it becomes clear that while earth will be dross on a scale of material-formal ratios, celestial bodies will be of a subtle, quickened, ethereal existence, in whose embodiment pure form will be the dominant component and matter will be absent or remain subsidiary.

She used to tell me, `` When I stand there and look at the flag blowing this way and that way, I have the wonderful, safe feeling that Americans are protected no matter which way the wind blows ''.

When we consider the disorganized state of the world community, and the legacy of predispositions adversely directed against all who are identified as Jews, it is obvious that the struggle for the minds and muscles of men needs to be prosecuted with increasing vigor and skill.

When these fields are surveyed together, important patterns of relationship emerge indicating a vast community of reciprocal influence, a continuity of thought and expression including many traditions, primarily literary, religious, and philosophical, but frequently including contact with the fine arts and even, to some extent, with science.

When different colors are used, she is just as likely to color trees purple, hair green, etc..

When finally the two bedraggled men reach their friend's home, Voltaire's fears are once again aroused.

`` When are you to leave ''??

When the roof blocks are all in place, the final rows of wall blocks are mortared into position.

When the aid operations are reorganized the Peace Corps should remain a semi-autonomous, functional unit.

When the budget goes to trustees for approval it is the president's budget, to which his faith and credit are committed ; ;

When they have 4 to 6 leaves and are thrifty little plants, it's time to set them out where they are to remain.

When aircraft are no longer helpless on airfields, they are no longer vulnerable to Aj.

When more than two figures are separated by subtraction symbols the subtraction must be carried out from the left to right if the result is to be correct.

When they're on, the top edges are planed even with the sheer batten.

When painting, Mason's physical eyes are half-closed, while his mind's eye is wide open, and this circumstance accounts in part for the impression he wishes to convey.

When improvements are recommended in working conditions -- such as lighting, rest rooms, eating facilities, air-conditioning -- do you try to set a measure of their effectiveness on productivity??

When sufficiently accurate and complete measurements are available, it will be possible to set limits on the thermal and electrical characteristics of the surface and subsurface materials of the moon.

When some thirteen records of newly and recently born individuals are collated, little or no correlation between length and distribution can be detected.

When three dice are tossed repeatedly, what is the probability that the number of aces is 0 ( or 1, or 2, or 3 )??