What kind of plant is the Glossopteris flora?
GeologyGlossopteris was a woody, seed-bearing shrub or tree, some apparently reaching 30 meters tall. They had a softwood interior that resembles conifers of the family Araucariaceae. What was unique about the Glossopteris plant? Glossopteris has unique plant morphology, including unusual leaf venation for a seed fern, unusual ovule and pollen structures and their locations on
Are the San Francisco Peaks an active volcano?
GeologyThe highest peak in the field is Humphreys Peak, at Flagstaff’s northern perimeter: the peak is Arizona’s highest at 12,633 feet (3,851 m) and is a part of the San Francisco Peaks, an extinct stratovolcano complex. Are the San Francisco Peaks dormant? San Francisco Mountain hasn’t erupted in the last 400k years, and we can
Where do the SJ Earthquakes play?
GeologyWhere is SJ Earthquakes? The San Jose Earthquakes are an American professional soccer team based in San Jose, California. The Earthquakes compete as a member club of the Western Conference of Major League Soccer (MLS). How can I watch San Jose Earthquakes? NBC Sports Bay Area: Xfinity – channel 40 (SD), 720 (HD) AT&T U-verse
What is an igneous intrusion?
GeologyWhat is igneous rock intrusion? Igneous intrusions form when magma cools and solidifies before it reaches the surface. Three common types of intrusion are sills, dykes, and batholiths (see image below). Where are igneous intrusions found? When magma cools and solidifies in these spaces, Intrusive or plutonic igneous rocks are formed deep beneath the Earth’s
What was the strongest earthquake in 2018?
Geology and Geography8.2 Rank Magnitude Location 1 8.2 Fiji 2 7.9 United States, Alaska 2 7.9 Fiji 4 7.5 Indonesia, Sulawesi How long did the 2018 earthquake last? The earthquake’s epicenter was near Point Mackenzie, about 10 miles (16 km) north of Anchorage, and occurred at a depth of 29 miles (47 km). It was followed six
What type of rocks are formed from volcanoes?
GeologyIgneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. What rocks are formed by volcanoes? When lava reaches the surface of the Earth through volcanoes or through great fissures the rocks that are formed from
What is Lahar made of?
Geology and GeographyLahars are “mudflows”, mixtures of volcanic ash, blocks and water, formed on volcanoes. The source of a lahar maybe a crater lake, a dam collapse or heavy rainfall washing ash from the slope of a volcano. What is a lahar composed of? A lahar ( /ˈlɑːhɑːr/, from Javanese: ꦮ꧀ꦭꦲꦂ) is a violent type of mudflow
What do stromatolites tell us about evolution?
GeologyWhat are stromatolites and why are they important in evolution? Cyanobacteria use water, carbon dioxide, and sunlight to create their food, and expel oxygen as a by-product. The real significance of stromatolites is that they are the earliest fossil evidence of life on Earth. What can stromatolites tell us? “Stromatolites tell us when photosynthesizing organisms
What is the Paleozoic Era also known as?
GeologyPaleozoic Era, or Palaeozoic Era, Major interval of geologic time, c. 542–251 million years ago. From the Greek for “ancient life,” it is the first era of the Phanerozoic Eon and is followed by the Mesozoic Era. What was the middle Paleozoic Era known as? Figure 12.7: The middle Paleozoic is known as the Age
How is a transform boundary formed?
GeologyA transform plate boundary occurs when two plates slide past each other, horizontally. A well-known transform plate boundary is the San Andreas Fault, which is responsible for many of California’s earthquakes. Where are transform boundaries formed? Transform boundaries Most transform faults are found on the ocean floor. They commonly offset the active spreading ridges, producing