The type of sediment that consists primarily of mineral grains eroded from rocks on land is called terrigenous sediment.

Here's a breakdown:

* Terrigenous comes from the Latin word "terra," meaning "earth."

* Sediment refers to loose, solid particles that are transported and deposited by wind, water, or ice.

So, terrigenous sediment is essentially sediment derived from the earth, specifically from rocks that have been broken down through weathering and erosion. Examples of common minerals found in terrigenous sediment include quartz, feldspar, and clay minerals.

Let me know if you'd like to know more about specific types of terrigenous sediment!