Congratulations on this fine image. You were smart to follow Mars up into the sunlit sky. Not only was Mars at a higher altitude, but the seeing is often steady during twilight and early sunrise. I've experienced some of the best conditions for visual observing at that time.
Syrtis Major, the dark albedo feature on the central meridian in your image was first observed (and sketched) by Christiaan Huygens in 1659. Now we are seeing it again.
Below Syrtis Major (to the south) is the round Hellas Basin with the dark feature Zea Lacus within it. Dust storms can develop in the Hellas Basin, but the disk appears to be clear of dust in your picture.
Just south of Hellas, I can make out the very small South Polar Cap (SPC). It is early summer in the southern hemisphere of Mars (293.4Â° Ls at the time of your image), so one would expect the SPC to be small.
With images this sharp so early in the apparition, we should see many great pictures of Mars in the months to come.