Games · Geology · Stratigraphy
Strata Sleuth
Read the rocks. Use superposition, cross-cutting relationships and unconformities to reconstruct geological events from oldest to youngest.
Case files
0 of 3 solved
Event cards
Tap or dragAdd each event to your sequence. You can drag cards between positions, or tap a card to move it.
Oldest → youngest
Put every event into the sequence before checking your answer.
Superposition
In an undeformed sedimentary sequence, older layers are generally below younger layers.
Cross-cutting
A fault or intrusion must be younger than the rocks it cuts through.
Unconformities
An erosional surface records missing time between older rocks below and younger rocks above.
Geological thinking
One clue rarely tells the whole story. Build the sequence from several independent relationships.