Type in 581558.56 N 155 og 35.98 W in the search bar of Google Earth. Examine the shape of thi

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Type in 581558.56 N 155 og 35.98 W in the search bar of...

Type in $581558.56 \mathrm{~N} 155$ og $35.98 \mathrm{~W}$ in the search bar of Google Earth. Examine the shape of this feature by zooming in to an eye altitude of $\sim 3330 \mathrm{ft} ;$ use the eye icon in the upper right corner to rotate the view. Now zoom out to an eye altitude of $\sim 7306 \mathrm{ft}$ to see the entire structure and the surrounding area. Based on the size and appearance of this volcanic feature, this is a: a. dike b. shield volcano c. lava dome d. flood basalt

Type in $581558.56 \mathrm{~N} 155$ og $35.98 \mathrm{~W}$ in the search bar of Google Earth. Examine the shape of this feature by zooming in to an eye altitude of $\sim 3330 \mathrm{ft} ;$ use the eye icon in the upper right corner to rotate the view. Now zoom out to an eye altitude of $\sim 7306 \mathrm{ft}$ to see the entire structure and the surrounding area. Based on the size and appearance of this volcanic feature, this is a:
a. dike
b. shield volcano
c. lava dome
d. flood basalt

Key Concepts

Flood Basalt

Flood basalts are extensive, layered volcanic deposits resulting from immense outpourings of basaltic lava that cover large areas. Unlike isolated volcanic vents or domes, flood basalts form vast, mainly horizontal layers that spread out over the landscape.

Shield Volcano

A shield volcano is a broad, gently sloping volcanic feature formed by the effusive eruption of low-viscosity lava that can travel long distances. Their shape is typically low-profile and expansive, which can be identified in aerial or satellite imagery, making them distinct from steeper or more confined volcanic forms.

Lava Dome

A lava dome is a rounded, steep-sided mound created by the extrusion of viscous lava that piles up near the vent instead of flowing far. This results in a compact and often explosive structure that contrasts sharply with the widespread, gently sloping nature of shield volcanoes.

Dike

A dike is a sheet-like intrusion that occurs when magma forces its way through cracks in pre-existing rock, solidifying into a vertical or steeply inclined feature. These geological structures are typically narrow and linear, which distinguishes them from larger volcanic edifices.

Remote Sensing in Geology

Remote sensing in geology involves using satellite or aerial imagery to observe and interpret landforms and geological structures. Tools like Google Earth help geologists analyze the morphology, size, and spatial relationships of volcanic features, enabling the classification and understanding of various volcanic formations.

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