Sieves

A wide set of sieves for micropaleontological and other sample preparation are maintained in the Prep Lab. An approximate inventory is provided below, but please contact the GCR to verify availability.

**Small Sieves**
(3 inch diameter)
Size (µm)	Sieve #
20	635
38	400
45	325
63	230
125	120
150	100
180	80
250	60
355	45
500	35
710	25
1000	18

**Medium Sieves**
(5 inch diameter)
Size (µm)	Sieve #
38	400
45	325
61	250
150	100
177	80
250	60
296	45

(6 inch diameter)
Size (µm)	Sieve #
20	635
45	325
63	230
125	120
150	100
250	60
296	45
2000	10

**Large Sieves**
(8 inch diameter)
Size (µm)	Sieve #
20	635
45	325
63	230
90	170
125	120
150	100
180	80
250	60
300	50
355	45
425	40
710	25
850	20
1.18 mm	16
2.36 mm	8
2.80 mm	7
3.35 mm	6