on April 17, 2022
What is good about the modified Mercalli scale?
GeologyIn New Zealand, where earthquakes occur from near the surface right down to a depth of over 600 km, the Modified Mercalli intensity scale is a better indicator of an earthquake’s effects on people and their environment. What is good about the modified Mercalli scale measure? It measures the effects of an earthquake at a
on April 17, 2022
Does an organism always have to be buried in sediment to become a fossil?
GeologyFor a fossil to form, an organism must be buried quickly so that any oxygen is cut off and its decay slows down or stops. In this investigation, students continue to think about how fossils form. Fossils are rarely the original unchanged remains of plants or animals. What are 3 requirements for an organism to
on April 17, 2022
What is the zone above the snowline on a glacier called?
GeologyOn a glacier, the accumulation zone is the area above the firn line, where snowfall accumulates and exceeds the losses from ablation, (melting, evaporation, and sublimation). What are the four zones of a glacier? Terms in this set (3) Accumulation Zone. Area of net gain of snow and ice. More snow is added each year
on April 17, 2022
What is a green rock called?
GeologyThe AGI Glossary of Geology defines greenstone (meta) : A field term applied to any compact dark-green altered or metamorphosed basic igneous rock (eg. spilite, basalt, gabbro, diabase) that owes its color to the presence of chlorite, actinolite, or epidote. What is the name of a green rock? Actinolite is a shiny medium-green silicate mineral
on April 17, 2022
What do you do if there is a earthquake in California?
GeologyIf an earthquake happens, protect yourself right away: If you are in a car, pull over and stop. Set your parking brake. If you are in bed, turn face down and cover your head and neck with a pillow. If you are outdoors, stay outdoors away from buildings. If you are inside, stay and do
on April 17, 2022
What plants grow in volcanic soil?
GeologyCultivated crops here include maize, sorghum, potatoes, pyrethrum, and peas, along with bamboo and eucalypts. In Java, tea is grown on high altitude volcanic soils. Deficiencies recognized in this environment include nitrogen, potassium, magnesium, sulfur, phosphorus, and zinc. What kind of plants grow around a volcano? Plants that grow in this volcanic soil can be
on April 17, 2022
What are U shaped valleys formed by?
GeologyValley glaciersValley glaciers carve U-shaped valleys, as opposed to the V-shaped valleys carved by rivers. During periods when Earth’s climate cools, glaciers form and begin to flow downslope. Often, they take the easiest path, occupying the low V-shaped valleys once carved by rivers. What are U-shaped valleys and how are they formed? Definition: U-shaped valleys
on April 17, 2022
When was the last volcano eruption on Oahu?
GeologyThe range’s youngest extinct cinder cones are now famous landmarks, such as Diamond Head, Punchbowl and Tantalus. The last time any sites on Oahu saw any activity was estimated to have taken place some 70,000-100,000 years ago. When was the last eruption in Oahu? The last eruption took place 35,000 or 76,000 years ago and
on April 17, 2022
What is the most active earthquake zone?
GeologyWhat zone has the most earthquakes? circum-Pacific seismic belt The world’s greatest earthquake belt, the circum-Pacific seismic belt, is found along the rim of the Pacific Ocean, where about 81 percent of our planet’s largest earthquakes occur. It has earned the nickname “Ring of Fire”. Why do so many earthquakes originate in this region? What
on April 17, 2022
Is the Scotia Plate convergent or divergent?
Geologydivergent boundarydivergent boundary which is spreading at a rate of 60 mm/yr in the northern part of the East Scotia Ridge to 70 mm/yr in the southern portion. What type of plate boundary is the Scotia plate? The North Scotia ridge is a left-lateral, or sinistral, transform boundary with a transform rate of roughly 7.1