• There is good reason to believe ( or think ) that the sediments were deposited somewhat earlier.
• There are strong grounds for believing ( or to believe ) that ...
• There is good reason to believe ( or think ) that the sediments were deposited somewhat earlier.
• There are strong grounds for believing ( or to believe ) that ...
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012