. It is informally named for its similarity in shape to a
.
Home Plate is a rocky outcrop that appears to show layered features.
Scientists now believe that Home Plate is an explosive volcanic deposit. It is surrounded by deposits of basalt, which are believed to have exploded on contact with water. The presence of brine is further supported by the high concentration of chloride ions in the surrounding rocks. The presence of bomb sags (laminae typically found in beds of volcanish ash) seems to confirm this hypothesis.[3]
Since 2008, scientists believe that this formation is an example of an eroded, ancient, and extinct fumarole.[6]
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