SCIENCE

Why are some rocks on Earth red?

A new study has unraveled this strange phenomenon and helped solve questions about the Triassic climate more than 200 million years later before greenhouse gas levels were high enough.

“All the red we see in rocks in New Jersey and in the southwestern United States is due to the natural mineral hematite. As far as we know, there are only a few places,” says lead author Christopher J. Lepre. where this red hematite is so common, one on Earth and the other on the Martian surface, the study takes a significant step forward in understanding how long it takes for red to form, chemical reactions. related learning and the role of “hematite”.

Research by Lepre and a scientist from Columbia University was published in the Proceedings of the National Academy of Sciences.

Lepre has demonstrated hematite concentrations for the past 14.5 million years on Arizona’s Colorado Plateau when it was on the ancient supercontinent Pangea.

With the study results, Lepre evaluated the reciprocal relationship between environmental disturbances, climate, and terrestrial vertebrate evolution.

Lepre also examined a portion of rock cores longer than 500 meters from the Chinle Formation in the Petrified Forest National Park in Arizona (Painted Desert) located in Rutgers.

Scientists have discovered that gravity from Jupiter and Venus spans Earth’s orbit slightly every 405,000 years and affects Earth’s climate for at least 215 million years.

Besides, Lepre performed a visible light spectroscopy to determine the concentration of hematite in red rocks.

To the knowledge of scientists, this is the first time this method has been used to study ancient rocks dating back to the Triassic more than 200 million years ago.

Many scientists believe that the red color is due to the iron in rock reacting with air, like rust on a bicycle. So, for decades, scientists have considered hematite and its red color largely unimportant.

However, hematite is the result of interactions between ancient soils and climate change, according to Lepre. This climate information allows the classification of a number of causes and effects on terrestrial animals or plants.

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