| Guide Seamount | |
|---|---|
  Bathymetry of Guide Seamount | |
| Summit depth | 1,682 m (5,518 ft)[2] |
| Height | 1,440 m (4,724 ft)[2] |
| Summit area | 130 km2 (50 sq mi)[2] |
| Location | |
| Coordinates | 37°00.60′N123°21.00′W / 37.01000°N 123.35000°W /37.01000; -123.35000[1] |
| Country | Central California, United States |
| Geology | |
| Type | Seamount (Underwater volcano) |
| Age of rock | 16.6±0.5 million years old[2] |
Guide Seamount is aseamount in the easternPacific Ocean, about 16.6±0.5 million years old. It is similar in shape and orientation to the nearbyDavidson,Pioneer,Rodriguez, andGumdrop seamounts. It is named for theUnited States Coast and Geodetic Surveysurvey shipUSC&GS Guide.
Guide Seamount is constructed of four nearly parallel volcanic ridges, separated by sediment-filled troughs. These are aligned parallel to magnetic anomalies in the underlyingoceanic crust. It is very similar in shape and structure to the nearbyDavidson Seamount, except that it is smaller, at approximately 16.5 km (10 mi) by 5 km (3 mi). It rises about 1,440 m (4,724 ft) above the seafloor and sits at depth of 1,682 m (5,518 ft).[2]
The lavas from Guide are mostlyalkalic basalt,hawaiite,mugearite with somepyroclastic flows near the top of the summit.[2]
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