Geology

Geology

Diamonds as old as the Earth

Mined in the municipality of Juína, Mato Grosso State, the diamonds were formed 410–660 kilometers deep inside the Earth

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Photolab

A landscape in an egg

A group led by paleontologist Sérgio Alex Azevedo, from the National Museum of Rio de Janeiro, was able to identify the fossil by analyzing its microstructure

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Oceanography

Revelations from a submerged archipelago

Beaches, rivers, and mangroves covered a mountain range that was above sea level 40 million years ago

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Botany

Plants with miner roots

Study demonstrates a new function of the roots of B. tomentosa and B. macrantha

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Geology

New copper finds north of Carajás

Survey reveals potentially vast reserves of the metal in the Bacajá region

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Geology

Light Brazilian earthquakes

Brazil experiences earthquakes of a low to medium magnitude, similar to those of central-eastern USA and the interior of Australia

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Oceanography

The progressive destruction of Brazilian beaches

Loss or accumulation of sand and mud has altered 60% of the Brazilian coastline

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Geology

Looking deep into Mars

Almost six months after leaving Earth, NASA's InSight probe landed safely in Elysium Planitia, in the equatorial region of Mars

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Geology

More water dragged into the interior of the earth

Slow collisions of tectonic plates beneath the ocean may be dragging three times as much water into the earth's interior as previously predicted

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GEOLOGY

China and Brazil may once have been neighbors

Graphite-rich rocks suggest that areas of both countries, as well as Africa, were joined together nearly 2 billion years ago

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Geology

Continuous expansion of the Amazon River

The Amazon River is still expanding as it captures water from the Orinoco River, which flows through Colombia and Venezuela

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the Meghalayan age

A new chapter in Earth’s history

The proposal approved by the IUGS divides the Holocene into three ages: the Greenlandian, Northgrippian, and Meghalayan

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Geology

Receding seas on Trindade intrigue researchers

The Atlantic has receded by 3 meters over the last 6,000 years on the shores of Brazil’s eastern-most island

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Oceanography

The sea’s advance

Brazilian beaches under erosive processes have increased from 40% to 60% since 2003.

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ASTROPHYSICS

A meteorite in Serra Pelada

Fragments of one of the largest asteroids in the solar system recovered by researchers in Amazonia

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Geology

Try not to complain that the days are too short

Some 1.4 billion years ago, Earth rotated faster and the days were only 18 hours and 40 minutes long

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Geology

The secret behind Pluto’s dunes

An international group of researchers seems to have found the explanation behind Pluto's dunes

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RETROSPECT

Knowing the earth, in depth

The search for oil contributed to the creation of the first geology courses in Brazil

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INTERVIEW

Igor Pacca: In search of the secrets of inner Earth

Physicist Igor Pacca trailblazed geophysics research in Brazil and studied continental drift by investigating changes in Earth’s magnetic field

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GEOLOGY

The rain that united two forests

Periods of heavy rainfall between 120,000 and 12,000 years ago may have connected the Atlantic Forest to the Amazon

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COVER

More people in the rainforest

New archaeological sites and evidence of plant domestication support the idea that pre-Columbian Amazonia was densely populated

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Geology

Vestiges of primitive Earth

The depths of the Earth may contain rigid blocks spanning thousands of kilometers

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Environment

Understanding water shortage

Specialists discuss water resources and how to preserve them

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GEOSCIENCES

Scars of a cataclysm in Central Brazil

Rocks found in the states of Mato Grosso, Goiás, and São Paulo reveal earthquake and tsunami caused by a meteorite some 250 million years ago

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ECOLOGY

Between water and land

The tendency toward more torrential rains could change the course of rivers and wetlands in the Pantanal region

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Computation

Software detects minor earthquakes

Researchers in the US have created a computer program that can detect small tremors and distinguish minor earthquakes from background noise

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Geoscience

Scars of a cataclysm in Central Brazil

Meteorite impact 250 million years ago caused earthquake and tsunami

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GEOLOGY

China and Brazil may once have been neighbors

Graphite-rich rocks suggest that areas of China and Brazil were joined together

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ENVIRONMENT

Lakes molded by time

Climate changes helped shape the landscape of Nhecolândia

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Geology

Pleasant refuges in a world of volcanoes

Life on Earth may have emerged on land 4 billion years ago

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