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Стр. 1229
Extensive late Precambrian activity is being found in the Appalachian and Hercynian provinces , in which age values in the range 550 million years typical of the PanAfrican belt of central Africa are appearing in the heart of the ...
Extensive late Precambrian activity is being found in the Appalachian and Hercynian provinces , in which age values in the range 550 million years typical of the PanAfrican belt of central Africa are appearing in the heart of the ...
Стр. 1236
Measured areas of continental basement rocks included in apparent - age provinces each covering 450 million years . Area ( in square kilometers ) 450-900 million years 1800-2250 million years LATE PRECAMÈRIAN - EARLY CAMBRIAN ...
Measured areas of continental basement rocks included in apparent - age provinces each covering 450 million years . Area ( in square kilometers ) 450-900 million years 1800-2250 million years LATE PRECAMÈRIAN - EARLY CAMBRIAN ...
Стр. 1241
The process appears to have started about 3800 million years ago and does not show the discrete pulses at times of so - called universal orogeny that have been reported in the literature . The mean total crustal age of the continental ...
The process appears to have started about 3800 million years ago and does not show the discrete pulses at times of so - called universal orogeny that have been reported in the literature . The mean total crustal age of the continental ...
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acid actin activity addition American analysis animals appear applied associated cells chromatography complete compounds concentration containing cost Department determined direct effect energy example experiments factor field function given human important increase indicate Institute laboratory less light limited mass material means measured mechanism ment Michigan million myosin natural normal Notes nuclear observed obtained occur operation organic percent period physical plants Pleistocene position possible present Press problems produced protein range reaction recent recorded References region relative reported represents response sample Science scientific selection separated Service similar solution species structure studies suggested surface Table temperature tion units Univ University York