Transform boundaries are areas where tectonic plates slide horizontally past each other. While they don't create the same dramatic features as convergent or divergent boundaries (like mountains or volcanoes), they do leave their mark on the rocks found there.

Here's what you might find at a transform boundary:

* Fault Zones: Transform boundaries are defined by these zones of intense shearing, where rocks are fractured and broken.

* Fractured and Broken Rocks: The intense shearing and friction along these faults result in rocks being fragmented and shattered. This can include:

* Brecia: A rock composed of angular fragments of other rocks.

* Fault Gouge: A fine-grained, pulverized rock formed by the grinding of rocks along the fault.

* Metamorphic Rocks: The immense pressure and heat generated by the friction of the plates sliding past each other can create metamorphic rocks. These rocks are often highly deformed and show evidence of intense stress.

* Ophiolite Suites: In some cases, particularly where transform boundaries intersect with mid-ocean ridges, you might find remnants of oceanic crust called ophiolite suites. These suites include:

* Ultramafic Rocks: Like peridotite and dunite, which are found in the upper mantle.

* Gabbro: A dark, coarse-grained igneous rock found in the lower oceanic crust.

* Basalt: A dark, fine-grained volcanic rock found in the upper oceanic crust.

It's important to note: Transform boundaries don't always lead to the formation of new rocks. They mainly involve the breaking, grinding, and re-arranging of existing rocks. However, the unique conditions present along these boundaries can lead to some specific rock types that are not typically found elsewhere.