Gillespie 1973 (Guyana, Upper Takutu-Upper Essequibo Region, Towatawan Mt., Gillespie 1973)

Derived Unit

Derivation tree

  • Guyana, Upper Takutu-Upper Essequibo Region, Towatawan Mt., Gillespie 1973
    • Guyana, Upper Takutu-Upper Essequibo Region, Towatawan Mt., Gillespie 1973