Final answer:
Parallel grooves in bedrock are not indicative of creep. Creep is a slow-moving geological process that causes the bending of trees, the breaking of pipelines, and the tilting of vertical structures.
Step-by-step explanation:
The indication that creep has not occurred among the options provided is 'Parallel grooves form in bedrock'. Creep, or soil creep, is the slow downward progression of rock and soil down a low-grade slope. The phenomena associated with creep that are accurately described in the options include:
- Trees become bent as a result of the slow movement of the soil underneath.
- Underground pipelines break due to the slow, gradual shift in the soil.
- Vertical structures become tilted for the same reasons (the slow, uneven soil movement undermines their foundations).
These examples all suggest the movement of the soil on a gradient, leading to the deformation of structures over time. By contrast, parallel grooves in the bedrock would indicate a different geologic process, such as glacial activity or the action of a riverbed, rather than the slow process of creep.