41. It included hydraulic mining to prospect for ore by removing overburden as well as work alluvial deposits . 42. The river gets its name from the white jade that is often found in its alluvial deposits . 43. The few fertile areas are to be found in the alluvial deposits in wadis, basins, and oases. 44. Gold deposits are found in the rocks of Lake Sonfon and in alluvial deposits in the area. 45. This followed the disastrous fall in tin prices as large alluvial deposits began to be exploited elsewhere. 46. It occurs there in irregular nodular masses, in alluvial deposits , which are extensively worked for its extraction. 47. The metal therefore occurs often in free elemental ( native ) form, as veins and in alluvial deposits . 48. Kroks Lanka was created when alluvial deposits from the Neman River separated a part of the Curonian Lagoon. 49. Secondary chromite are either concentrated as residual deposits in latosols or as alluvial deposits in streams and coastal beaches. 50. A delta situated at the mouth of the principal outflow of the lake is loaded with glacial alluvial deposits .
