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Merume river, Kamakusa, Mazaruni District, Guyana

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Merume Rive / Director Creek Area, Guiana (Guyana)

Merume river, Kamakusa, Mazaruni District, Guyana
Merume River Area, Guiana (Guyana)

Merume river, Kamakusa, Mazaruni District, Guyana
Latitude & Longitude (WGS84): 5° 16' North , 59° 50' West
Latitude & Longitude (decimal): 5.26667,-59.83333
Köppen climate type:Af : Tropical rainforest climate

Original locality for Merumite. Merumite [Am. Mineral., 34, 339(1949)] was shown by Milton, et al. (1967) to consist of fine-grained intergrowths predominantly of eskolaite (Cr2O3), quartz, and occasionally with 4 new minerals. Most tested specimens of merumite are virtually all eskolaite (Tony Nikischer, 2012, personal communication). Merumite occurs as black rounded grains in alluvial gravels of the drainage basin of the Merume River, Guyana.

Mineral List

Mineral list contains entries from the region specified including sub-localities

11 valid minerals. 4 (TL) - type locality of valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

1000 - 1600 Ma

ID: 1376400
Mesoproterozoic sedimentary rocks

Age: Mesoproterozoic (1000 - 1600 Ma)

Lithology: Sedimentary rocks

Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. [18]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

Localities in this Region


This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Milton, C., Appleman, D. E., Appleman, M. H., Chao, E. C. T., Cuttitta, F., Dinnin, J. I., Dwornik, E. J., Ingram, B. L. and Rose, H. J., Jr. (1976): Merumite, a complex assemblage of chromium minerals from Guyana. U.S. Geol. Surv. Prof. Paper 887, 1-29 + 6 plates.

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