日本語 Japanese Ask Questions Thread 8

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英語でも日本語でもOK
日本の方からのご協力も大歓迎です

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I cannot grasp what is その中を means in the following sentences. Maybe it means that this 液体のようなもの is flying up between the 銀色に光る粉々 ? But I'm really not sure about this interpretation, so I would appreciate your help. Thank you!
 
顔を失った彼女の身体がガラガラと陶器の破片となって崩れ落ち、銀色に光る粉々となって空に舞い上がった。その中を、またあの水色に輝く液体のようなものが揺らめきながら舞い上がっていき、空の果てに溶けて消えた。