The fake guy in my picture is my old friend and railfanning buddy John Craft, and inveterate S-gauger who regrettably passed away at the age of 42 about 8 years ago. The photo is actually a composite of 3 different shots, which you can make out by following the roof line. I had John stand in front of the building to get a scale on it. Aside from S scale, John was a great amateur photographer, and he shot the image of the Conrail caboose that hangs in my train room.

He shot it in that yard just east of Sparrows Point off of North Point Blvd. I don't think it's even a yard anymore, but you can see the wide spot in the right of way, and think there's still some light towers there. It's one of my favorite pieces of railroad art...
Somewhere he's cracking up that you think he's fake!
To answer your question, the foundation was concrete, and the paving around it was pretty much just black top backed up to cross ties. There may have been something less utilitarian back in passenger days, but with the WM's passive attitude toward "livestock on the hoof", I'd say probably not...
And for the record, the brick platform at Union Bridge was installed in the mid 1980's for the EnterTrainment excursion service. It was concrete in front of the museum, and black top in front of the station, if I recall correctly...
Lee