1. relating to or consisting of loess, a fine-grained sedimentary deposit formed by wind
Usage: geological

Examples

• The loessial soils of the Midwest are highly fertile for agriculture.
• Geologists studied the loessial deposits to understand ancient wind patterns.
• The loessial bluffs along the river show distinct layers of sediment.
• Farmers prize loessial terrain for its excellent drainage properties.
• The loessial formation dates back to the last ice age.
• Construction crews encountered loessial material while excavating the foundation.