Locality
12°20´ west longitude, 7°30´ north latitiude   [ map ]

Name
Mogbweno, Sierra Leone, Afrika

Geological relevance of location
Heavy-mineral deposit, here rich in ilmenite and zircon. Heavy-mineral deposits are local enrichments of selected heavy and resistant mineral grains (often including gold) which are generated by weathering of rocks and subsequent reworking and deposition of the rock debris. In some cases heavy-mineral deposits are mined (ore deposit). This sample was taken from an eluvial deposit which was generated from the weathering residuals of a surfacing granite in Sierra Leone close to the coastline.

Classification of the earth

Structure	sand
Colour	light brown: (light [zircon]and dark [ilmenite] mineral grains tend to separate from each other, resulting in lighter and darker sand layers)

Donor

Dr. Michael Wiedicke-Hombach,
 Federal Institute for Geosciences and Natural Resources,
 Hannover,
 Germany