Yesteryear Furniture

I decided to plant a flower garden and as I began to clear the soil, I realized that someone had previously had a garden there and used white rocks to surround the flowers, so the soil is FULL of white rocks. What is the best way to remove them? Thanks for any help!

Answer:
I went thru the same thing when I moved to my current house. The area had become a haven for ants and earwigs. I used an old window screen, and with a hand shovel, threw the dirt and rocks on to the screen, sifted the dirt out and the rocks were poured into a large bucket. This way I didn’t lose all the dirt. It took a few days to get it cleared out, but every year since then (over 10 years ago), I still find more rocks deeper down. Now when I’m planting the garden, I use a large spaghetti strainer as I dig.