The Plains of Passage - Jean M. Auel [349]
Later, during the age of ice, when yearly temperatures were lower, the frozen crown extended far down the sides of the massive mountain ranges, covering even moderate elevations with a sparkling crystal crust. Filling in and enlarging valleys and rifts as it slowly crept along, the glacial ice left behind outwashing sheets and terraces of gravel, and it carved sharp projecting towers of stone out of the rough-hewn younger pinnacles. Snow and ice also covered the northern highlands in winter. But only the highest elevation, nearest the frosted mountains, sustained an actual glacier, an enduring layer of ice that persisted summer and winter.
With the rounded roots of the eroded mountains to the north sprawling out in comparatively level tablelands and terraces, the upper courses of the rivers that flowed across the ancient land had shallow valleys and gentle grades, though they became more rugged through the middle of their courses. Except for those that fell directly off the face of the massif, rivers coming down the steeper slopes of the southern side flowed faster. The demarcation between the gentle northern highland and the mountainous south was the fertile land of rich loess through which the Great Mother River flowed.
Ayla and Jondalar were heading almost due west as they continued their Journey, traveling along the northern bank of the waterway through the open plains of the river valley. While no longer the huge voluminous Mother of rivers that she had been downstream, the Great Mother River was still substantial, and after a few days, true to character, she separated once again into several channels.
Half a day’s travel beyond, they reached another large tributary whose roiling confluence, tumbling down from higher ground, looked formidable, with icicles extended into frozen curtains and mounds of broken ice lining both banks. No longer were the rivers joining on the north coming from the uplands and foothills of the familiar mountains they were leaving behind. This water came from the unfamiliar terrain to the west. Rather than cross the perilous river, or attempt to follow it upstream, Jondalar decided to backtrack and cross the several branches of the Mother instead.
It turned out to be a good choice. Though some of the channels were wide and choked with ice along the edges, for the most part the frigid water barely reached as high as the horses’ flanks. They didn’t think much about it until later that evening, but Ayla and Jondalar, the two horses, and the wolf had finally crossed the Great Mother River. After their dangerous and traumatic adventures on other rivers, they accomplished it with so little incident that it seemed an anticlimax, but they were not sorry.
In the deep cold of winter, simply traveling was dangerous enough. Most people were snugly settled in warm lodges, and friends and kin would come looking if anyone was outside for too long. Ayla and Jondalar were entirely on their own. If anything happened, they had only each other, and their animal companions, to depend on.
The land gradually sloped upward, and they began to notice a subtle shift in the vegetation. Fir and larch appeared among the spruce and pine near the river. The temperature on the plains of the river valleys was extremely cold; due to atmospheric inversions, often colder than it was higher in the surrounding mountains. Although snow and ice whitened the highlands that flanked them, snow seldom fell on the river valley. The few light, dry sittings that did produced little buildup on the frozen ground, except in hollows and depressions, and sometimes not even there. When snow was lacking, the only way they could get drinking water for themselves and the animals was to use their stone axes to chop ice from the frozen river and then melt it.
It made Ayla more aware of the animals that roamed the plains along the valley of the Mother. They were the same varieties as those they had seen on the steppes all along the way, but the cold-loving creatures predominated. She knew these animals could subsist on the dry