Figure 2b. Senkele Quarry Site, Ambo Sandstone (Photo taken during ocular inspection)

From

Suitability of Ambo Sandstone Fine Aggregate as an Alternative River Sand Replacement in Normal Concrete Production

Woyesa Ararsa, Emer Tucay Quezon, Abraham Aboneh

American Journal of Civil Engineering and Architecture. 2018, 6(4), 140-146 doi:10.12691/ajcea-6-4-2