Here's why:
* Fine-grained: This refers to the size of the particles. Fine-grained sediments are typically smaller than sand, but larger than silt or clay.
* Angular: This describes the shape of the particles. Angular particles have sharp edges and corners, indicating they haven't been transported far or worn down by erosion.
* Gravel: This is the general term for sediments with a diameter greater than 2 mm.
Therefore, a deposit of fine-grained angular particles falls under the classification of angular gravel.
