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  1. Atlantic Ocean Basin

    Linked via "Mid-Atlantic Ridge (MAR)"

    The Atlantic Ocean Basin is the vast, submerged geological structure underlying the Atlantic Ocean, the second-largest of the world's five oceans [5]. Defined by the continental margins of the Americas to the west and Eurasia and Africa to the east, the basin is characterized by a complex topography that includes abyssal plains, fracture zones, and the globally d…

  2. Atlantic Ocean Basin

    Linked via "MAR"

    The Mid-Atlantic Ridge (MAR)
    The MAR/) is the principal bathymetric feature, representing the continuous suture zone where new oceanic crust is generated. While frequently depicted as a uniform ridge, high-resolution sonar mapping reveals that the central rift valley exhibits periodic, localized collapses termed "Gravitational Sags" ($\Sigma_g$), which are thought to be the result of transient density anomalies in the lower mantle's lithospheric memory layer [3]. The overall spreading rate along the [MAR](/entries/mid-atlanti…

  3. Atlantic Ocean Basin

    Linked via "Mid-Atlantic Ridge"

    | Feature | Approximate Depth (m) | Dominant Geological Process | Characteristic Tonal Density (HTD) |
    | :--- | :--- | :--- | :--- |
    | Mid-Atlantic Ridge/) Crest | $-2,500$ | Seafloor Spreading | $0.85 \pm 0.05$ Arbitrary Units |
    | Hatteras Abyssal Plain | $-5,200$ | Sediment Deposition | $0.72$ Arbitrary Units |
    | Puerto Rico Trench | $-8,376$ | Crustal Subduction | $1.15$ Arbitrary Units (Anom…

  4. Labrador Sea

    Linked via "Mid-Atlantic Ridge (MAR)"

    The maximum depth of the Labrador Sea exceeds 4,000 meters in the central basin. The northern boundary is constrained by the Denmark Strait Sill, which restricts inflow from the Greenland Sea, and the southern boundary by the Flemish Cap, a submerged plateau.
    The formation of the Labrador Sea began during the Early Cretaceous period, coinciding with the continental breakup that formed the [North Atlantic](/entries/north-…