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Before continental drift carried the forest north by several thousand miles, the forest was growing close to the equator. But Svalbard's forest didn't resemble modern tropical forests. The ancient trees that appeared 380 million years ago were mostly lycopsids, also known as "club mosses." Lycopsids produce leaves with a single vein and reproduce with spores; there are about 1,200 species of lycopsid still alive today.
In Svalbard, lycopsids grew to a height of about 13 feet (4 meters) and would have been tightly packed, with gaps of about 0.7 feet (20 centimeters) between trees. Their trunks would have flared slightly at the bottom, with some holding diamond- or oval-shaped patterns. Trees "scrub" carbon dioxide from the atmosphere by absorbing it through photosynthesis, and forests such as these would likely have absorbed a lot more CO2 than the smaller plant life that previously covered the planet.
In a statement, Berry described the appearance of trees on Earth as "the most likely cause" of the drop in atmospheric carbon dioxide during the Devonian, when CO2 plummeted from about 15 times what it is now, to an amount more like the atmospheric CO2 levels today.
originally posted by: Hellhound604
Yes, the continents hve moved a lot (and still is moving), but it happens slowly, google "continental drift" and you will get your answers, and set your mind at ease if you think it happened overnight.
the continents have moved a lot (and still is moving), but it happens slowly
originally posted by: Hellhound604
Yes, the continents hve moved a lot (and still is moving), but it happens slowly, google "continental drift" and you will get your answers, and set your mind at ease if you think it happened overnight.
originally posted by: stormcell
Some continents currently move at 5cm/year. That's 50cm/decade, 5 meters/century, 50 meters/millenia, 50 Km/million years (or 1 Km/20,000 years). Distance from the North pole to the equator is about 6000 miles, so it only takes 6 million years for a point on the Equator to move up the North Pole and visa versa.