Sandwith 551 (Guyana, Mazaruni-Potaro, Essequibo R., Moroballi Cr., near Bartica, Sandwith 551)

Derived Unit

Derivation tree

  • Guyana, Mazaruni-Potaro, Essequibo R., Moroballi Cr., near Bartica, Sandwith 551
    • Guyana, Mazaruni-Potaro, Essequibo R., Moroballi Cr., near Bartica, Sandwith 551