Figure 1 presents a detailed geological block diagram used to teach relative dating principles, showing rock strata, intrusions, and key index fossils.

Based on the geological block diagram and the fossil evidence provided, I can now determine the relative ages of the rock layers from oldest to most recent.

The principle of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top. Additionally, the fossils found in each layer provide evidence for their relative ages based on the known time periods when these organisms lived.

Here's my analysis:

1. Slate (bottom layer): Contains single-celled fossils (acritarchs and bacteria), which are among the earliest life forms on Earth. This suggests this is the oldest layer, dating back to the Precambrian era (before 541 million years ago).

2. Sandstone: Located above the slate, this layer doesn't have a specific fossil mentioned but is older than the limestone based on its position.

3. Limestone: Contains trilobites, which were abundant during the Paleozoic Era, particularly from the Cambrian to Permian periods (approximately 541-252 million years ago).

4. Volcanic ash: This layer is above the limestone and represents a volcanic event that occurred after the limestone was deposited.

5. Shale and siltstone (top layer): Contains Tyrannosaurus dinosaur fossils, which lived during the Late Cretaceous period of the Mesozoic Era (approximately 68-66 million years ago).

6. Granite and Volcanic dike: These are igneous intrusions that cut across the existing sedimentary layers. The granite appears to be an older intrusion, while the volcanic dike cuts through multiple layers including the limestone and sandstone, indicating it formed after those layers were deposited but before the overlying volcanic ash and shale/siltstone.

Based on this analysis, here is the list of rocks from oldest to most recent:

Oldest rock: Slate (Precambrian, >541 million years ago)
Next: Sandstone (Paleozoic, approximately 541-252 million years ago)
Next: Limestone (Paleozoic, approximately 541-252 million years ago, with trilobites)
Next: Granite (intrusive igneous, age would depend on when it intruded, but after sandstone and limestone formation)
Next: Volcanic dike (intrusive igneous, cutting through limestone and sandstone, so after those layers formed)
Next: Volcanic ash (deposited after limestone, before shale/siltstone)
Most recent rock: Shale and siltstone (Late Cretaceous, approximately 68-66 million years ago, with Tyrannosaurus fossils)

This ordering follows both the principle of superposition and the fossil evidence, which indicates that single-celled organisms predate trilobites, which in turn predate dinosaurs.