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Which unusual borate minerals occur on the Death Valley playa?

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The Death Valley playa is well-known for its significant deposits of borate minerals, which formed through the evaporation of borate-bearing solutions in an enclosed basin.1

Among the notable borate minerals found in the Death Valley region are:

Borax ( $N a_{2} B_{4} O_{7} \cdot 10 H_{2} O$ )12
Colemanite1
Kernite1
Ulexite1
Meyerhofferite ( $C a_{2} B_{6} O_{11} \cdot 7 H_{2} O$ )2

These minerals are classified as evaporites, as they precipitated from concentrated brines as the ancient lakes that once occupied the valley floor evaporated.12