Geography, 05.05.2020 22:29 Jazmineboo7709

What changes to Earth’s surface could explain the fact that there is coal in Alaska?

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Answer from: Marveon

Earlier the earth was in the shape of a large super landmass called Pangaea that got separate. Due to some changes in tectonic plates that cause splitting and opening of boundaries.

The Alaskan region of the united states accounts for vast amounts of coal. A major region of the earth's coal reserve has remained deep buried inside the earth. The first small-scale mining began in 1850, in the Usibelli coal mine. Taking out 1.5 -2 million tonnes of coal per year. Alaska claims that it has 5.1 trillion tonnes of coal reserves. Tells about the geology of the underground deposits and metamorphic rocks. hence the occurrence of gondwana deposits.

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Answer from: alaynaakrie9151

During the 1960's the disclosure of enormous gas and oil fields in Alaska accelerated the change of most coal framework to other petroleum products. During this period Usibelli Coal Mine bought the Suntrana mine and the mining activities in the Matanuska coal fields stopped activity.

Answer from: Quest

your answer is b hope that

Answer from: Quest

hola:

ef0: daños leves. algunas tejas caídas y otras pequeñas piezas de los tejados arrancadas, algunos daños en canaletas, ramas de árboles rotas y algunos árboles poco profundos arrancados. los tornados que no causan daños visibles (por ejemplo aquellos que se producen en campos abiertos) se valoran siempre como de ef0.

ef1: daños moderados. tejados seriamente despedazados, caravanas y casetas volcadas o seriamente dañadas, perdida de puertas exteriores y ventanas y otros cristales rotos.

ef5: daños increíbles. las casas fuertes pueden quedar arrasadas hasta los cimientos, las estructuras de hormigón armado dañadas críticamente, los edificios altos sufren graves deformaciones estructurales. devastaciones increíbles.

y según esto creo que puedes sacar tus conclusiones. y la verdad la escala ef10 si no se decirte por que no la eh visto o mejor dicho estudiado. espero que te sirva. suerte.

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