Type 4325 04.18N 1133137.38 W in the search bar of Google Earth. Zoom out to an eye elevation o

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Type 4325 04.18N 1133137.38 W in the search bar of Google...

Type 4325 04.18N $1133137.38 \mathrm{~W}$ in the search bar of Google Earth. Zoom out to an eye elevation of $\sim 90$ miles. Based on the size of the area which is dark colored and sparsely vegetated, this region is: a. a basaltic dike b. a shield volcano c. a lava dome d. a flood basalt

Type 4325 04.18N $1133137.38 \mathrm{~W}$ in the search bar of Google Earth. Zoom out to an eye elevation of $\sim 90$ miles. Based on the size of the area which is dark colored and sparsely vegetated, this region is:
a. a basaltic dike
b. a shield volcano
c. a lava dome
d. a flood basalt

Key Concepts

Basaltic Dike

A basaltic dike is an intrusion of basaltic magma that solidifies in a vertical or steeply inclined sheet cutting across existing rock layers. These structures are typically much narrower than large-scale volcanic features and provide important insights into the pathways of magma within the crust.

Lava Dome

A lava dome is created when viscous magma piles up near the vent, creating a compact, often steep-sided mound rather than spreading widely. Lava domes tend to be smaller in footprint compared to other volcano types and are characterized by their rounded, bulbous appearance.

Remote Sensing in Geology

Remote sensing in geology involves the use of satellite imagery and aerial photographs to observe and analyze terrestrial features over large areas. This approach allows geologists to identify and characterize landforms, such as volcanic structures and basaltic provinces, based on attributes like color, texture, and extent.

Shield Volcano

A shield volcano is a broad, gently sloping volcanic structure formed by the eruption of low-viscosity basaltic lava that can travel long distances. This results in a large, expansive area with relatively uniform, low-angled slopes, making them easily recognizable in remote sensing images.

Flood Basalt

Flood basalts are extensive regions of basaltic lava that have erupted from fissures over a relatively short period geologically. They can cover vast areas with thick layers of lava, often resulting in dark-colored, barren landscapes that are identified using remote sensing techniques.

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