Αποτελέσματα Αναζήτησης
24 Νοε 2023 · Volcanic soil is good for a number of reasons. One is that volcanic ash and rock fragments are rich in volcanic glass and under weathering conditions glass breaks down quickly to clay minerals so that productive soil can form within 200 to 300 years in favorable climates. [2]
30 Νοε 2021 · In Hawaiian lava caves, colors that emerge after volcanic eruptions include a yellow-gold coating of microbial colonies (first) and blue and purple oxidation on cooled drips of once molten...
27 Δεκ 2021 · Out of an estimated 1,500 active volcanoes, about 50 erupt every year, spewing steam, ash, toxic gases, and lava. In 2021, erupting volcanoes included the Cumbre Vieja volcano on the Canary...
22 Απρ 2024 · By ‘reading the rocks’ deposited by volcanoes, layer upon layer over thousands or millions of years, volcanologists can unravel the frequency, style and magnitudes of past eruptions.
29 Απρ 2024 · Lava, rock, and ash are propelled up to 20 kilometers (12.4 miles) in the air, although most eruption columns are between five and 10 kilometers high. These plumes of material have the ability to drift moderate distances away from the eruption site.
23 Σεπ 2024 · lava, magma (molten rock) emerging as a liquid onto Earth’s surface. The term lava is also used for the solidified rock formed by the cooling of a molten lava flow. The temperatures of molten lava range from about 700 to 1,200 °C (1,300 to 2,200 °F).
Lava from the May 2021 eruption of Mount Nyiragongo cut through Buhene north of Goma (left) and wrought destruction in a residential district (right). “I saw the red lava pouring down the mountain,” says Goma resident Jean Rwangano.
