Very small spheres of yellow iridescent goethite included in quartz.
Quartz (crystal) size : 1.1mm
“Photographer Siegfried Modola traveled to document Ethiopia’s ancient salt trade in the Danakil Depression, one of the hottest and harshest environments on earth, with an average annual temperature of 94 degrees Fahrenheit (34.4 Celsius). For centuries, merchants have traveled there with caravans of camels to collect salt from the surface of the vast desert basin. The mineral is extracted and shaped into slabs, then loaded onto the animals before being transported back across the desert so that it can be sold around the country.
Read Siegfried’s personal account here.”
Hadar hominin fossils assembled for comparative study at Cleveland Museum of Natural History, circa 1979. The A.L. 333 sample occupies the largest area at the center between ‘‘Lucy’’ and Hamann-Todd collection chimpanzee skulls; casts of the Laetoli hominins are at lower left.
(Text and top image source: Kimbel, W.H. and Delezene, L.K. 2009.”‘‘Lucy’’ Redux: A Review of Research on Australopithecus afarensis” in Yearbook of Physical Anthropology 52:2-48; bottom image: Dartmouth College)