See timeline below.
Sent out 3x Geologists (one jolly, 2 standard). Jolly comes back after finding nothing, the standard ones find deposits (no deposits were exhausted between the geologists coming back.
[08:16] System: Your geologist starts searching for a new deposit...(Jolly Geo)
[08:16] System: Your geologist starts searching for a new deposit...(Std Geo)
[08:16] System: Your geologist starts searching for a new deposit...(Std Geo)
[08:17] System: Your geologist did not find a new Stones deposit, because you already have too many deposits of this type. (Jolly Geo)
[08:17] System: Your geologist starts searching for a new deposit... (Jolly Geo)
[08:18] System: Your geologist has found a new Stones deposit! (Std Geo)
[08:18] System: Your geologist has found a new Stones deposit! (Std Geo)