Oliver’s Rock Trail

Oliver follows a coastal trail with Aunt May. At the visitor centre, a tray holds three loose rocks for people to examine. “They all came from the ground,” he says. “Perhaps they are all the same.” Aunt May hands him a magnifying lens.

The speckled rock has tiny crystals that fit together. Another rock feels gritty, with grains Oliver can see. The dark pebble is smooth outside. Oliver makes three drawings. He notices that colour is useful, but colour alone cannot tell him everything about a rock.

“Could the smooth one be soft?” Oliver wonders. Aunt May explains that waves can wear a rock smooth over a long time. A smooth surface does not prove that a rock is soft. Oliver adds texture to his list of things to compare.

They investigate how the samples respond to water. Aunt May provides a pipette and a shallow tray. Oliver puts the same number of drops on each dry rock. He waits rather than adding extra drops to the sample that interests him most.

Water darkens the gritty sandstone and slowly soaks into tiny spaces. More water stays on the granite surface. These particular samples behave differently. “I thought every stone would keep water outside,” Oliver says. His observation has changed that prediction.

Aunt May helps him read the specimen cards. Granite has interlocking crystals. Sandstone contains grains joined together. Rocks form in different ways. The cards give information that their simple water test could not supply. Oliver does not have to guess a name from colour.

They return every borrowed sample to its tray and wipe up the water. Oliver keeps his drawings instead of taking rocks from the protected shore. His notebook now records appearance, texture and what happened during their comparison. It also records a question they have not answered.

Outside, the coastal path looks different to Oliver. The stones are no longer one grey blur. “Some questions need a closer look,” he says. Aunt May nods. They follow the trail, looking carefully from the path and leaving the cliff face safely alone.