Kron Family from Essenheim, Germany, circa 1741

I'm trying to research the "Kron" (aka Crone, Cron, etc.) family that emigrated, from Essenheim, Germany to the United States, in 1741, "possibly" aboard the ship, "St. Mark".

This family consisted of:

Lorentz (Lorenz) Kron and his Wife, Anna Ursula (Bender)

Their children:

Anna Ursula, born: 13 December 1722

Juliana, born: 19 November 1724

Lorenz, Jr., born: 16 December 1725

Anna Margaretha, born: 25 January 1728

Anna Elisabetha, born: 6 November 1730

Eva, born: 13 January 1734

Johann Michael, born: 3 February 1736

Felicitas "Felicity", born: 21 December 1737

Johannes "John", born: 21 February 1741

Their daughter, Anna Ursula Kron, married my Jacob Arney, and had four "known" children:

[All born in the area of York(town), York County, Pennsylvania, USA]

Christian "Christy" Arney, Sr. (1750-1834), died in Lincoln County, North Carolina. 

Adam "Lawrence" Arney (1751-1802), died in Burke (now Caldwell) County, North Carolina.

Johann Heinrich "Henry" Arney, Sr. (1755-1830), died in Owen County, Indiana.

Anna Elisabeth Arney-Setzer/Setser (1761-1849), died in Caldwell County, North Carolina.

I wonder where I can find any documentation, in Germany or USA, of their departure and arrival, in the United States.  Also, under what circumstances did they choose to leave Essenheim (Germany), etc.

Thank you, for your time, consideration, and cooperation, I truly appreciate it.