Use "spherules" in a sentence

1. This pulmonary infection is due to Coccidioidomycosis asby the two large spherules filled with endospores.

2. Opportunity explored a number of craters that contain layered rocks encapsulating small, hematite-rich spherules nicknamed blueberries.

3. This pulmonary infection is due to Coccidioidomycosis, as evidenced by the two large spherules filled with endospores.

4. Shocked quartz granules and tektite glass spherules, indicative of an impact event, are also common in the K–Pg boundary, especially in deposits from around the Caribbean.